I don't know much about the X since I stopped at the iPhone 7 and I am probably not going to buy any of their exorbitantly priced phones. That being said, in their pursuit of thin phones they ran into design issues with boards flexing so that BGA components will eventually fail. They became aware of the problem and then proceeded to make the same mistake again in later models rarther than fixing the problem. (The flexing problem isn't that they will break after one "bending event", but rather than they fail over time as your phone is subject to mechanical stresses of what is within the range of normal use. Typically because the tiny balls under BGAs will let go)
I'm mostly talking about their laptops and their iMacs. The USB C connectors are of course inconvenient, but I actually like them. Again, the problem is that in their pursuit of thinness they ended up designing keys that are very sensitive to dust (and not very nice to use). In subsequent models they kept at it, so the quality of keyboards doesn't seem to be a priority. Some laptops have a tendency to develop display problems due to bad design. For instance blowing hot air on parts that can't take hot air or laying out connectors so that they will fail more easily.
Now these are design flaws, which brings us to the "abusive and fraudulent" part. If you want to get these things fixed under warranty you _may_ be okay. Except the process appears to be entirely decided by chance. For instance they have put moisture indicators inside the macbooks that not only react to liquid damage, but which turn from white to red (indicating moisture) over time depending on the humidity in the air where you use it. (Most people don't know how these things work, so they'll accept it). So they'll accuse you of having spilled liquid in your laptop and refuse to fix it even when this is not the case. Accusing their customers of lying isn't a very good way to behave.
In many cases they will also claim that your laptop is in need to expensive component replacements. Either because they claim that the component cannot be repaired or when their service technicians fail to correctly diagnose the equipment. The repair costs quoted are supposed to make you buy a new computer rather than fix the one you have.
On top of that they have the gall to claim that independent repair shops are somehow less qualified than Apple. Which naturally rings true in the ears of most people; they designed it so they should be the best to fix it, right? However, this doesn't seem to be generally true. Especially since Apple and their authorized resellers appear to have very limited diagnostic and repair capability and the qualifications vary.
When you do send in an Apple device, you have to be aware of the fact that it isn't Apple that repairs your equipment - it is a subcontractor. And they are not always the best.
Wich brings us to the bullying. Apple do their best to kill the independent repair market any way they can. Often by filing lawsuits against repair shops and then putting them out of business. When confronted with this they us their go-to excuses. Like protecting the consumer from unqualified repair shops.
They do this by denying independent repair shops access to the supply line - meaning they work hard to make it difficult to obtain spare parts and components. Compare this to, for instance, Samsung, which sell parts online to make it easy for repair shops to get the needed parts. In order to get parts for Apple products there is an entire market for broken laptops that are bought and sold to repair shops in order to provide donor boards for components.
Of course, then there is the fact that they seem to deliberately make things harder to repair or upgrade. For instance batteries that are glued in unnecessarily, increasing the chance of destruction if you try to replace them. Or soldering in components that the user may want to upgrade later (like RAM and SSDs). For instance on my mac mini the SSD is soldered in, but fortunately the RAM is socketed.
I became aware of the systematic nature of this about a year ago when starting to watch videos to learn how to solder surface mount components (I do a bit of electronics). I stumbled over people who repaired Macs for a living. I didn't come there for the rants, but when starting to research the issue a bit and speaking to a couple of people who also do this for a living, it became obvious to me how terribly Apple are behaving.
Two things struck me 1) diagnosing and fixing macs isn't rocket science. People are able to even as Apple tries to starve them for information. 2) most people don't know how electronics are fixed so of course Apple will get away with claiming they are protecting their users by not allowing independent repair shops to repair their stuff. Diagnosing and replacing broken components and cleaning up fouled circuit boards is not all that hard. Sure, you need the equipment, ability to read schematics and some ability to diagnose electronics, but there are people who do that for a living.
And you really do want to be able to pick your computer repair people just like you pick repair shops for your car. I use a mechanic I know and trust for my car - a guy who walks me through everything he does with my car and even shows me what he has done, and what he thinks should be done. I never use the brand workshop simply because those guys only follow procedures (which aren't always correct), I have no idea who works on my car and I have no insight into what is actually done or if the car is actually fixed or serviced correctly.
If anything, my computer is even more important to me so of course I don't want some semi-qualified, random clown subcontractor of Apple, far away, to work on my computers.
The upshot of all this is that I feel very uncomfortable as a Mac user. Whenever I buy a Mac I am taking a huge risk. If something breaks I may not be able to fix it and the only option available to me might be to buy an entirely new machine. Even when the fault is due to a cheap component that takes 10-15 minutes to replace. Simply because Apple actively work to withhold spare parts from the market.
This is even more true if you buy one of their expensive models. The new Mac Pro may look nice, both in terms of specs, price and looks, but if it breaks, you have no way of knowing if you are going to lose your investment. Your machine may become completely worthless as a result of a trivial, cheap component breaking.
If I trusted Apple as a hardware vendor I would probably have upgraded my laptop to a newer model and I would probably have bought an iMac Pro rather than a Mac mini. But since I can't trust them I'm looking at starting to move away from Apple. My next laptop probably isn't going to be an Apple and my next desktop computer is probably not going to be an Apple since I need more power with less risk.
I'm really not fond of the idea of running Linux and having to depend on vmware to run Windows for a lot of the desktop stuff, but this may be the only viable route if Apple doesn't get their act together.
Enough text. Here are some videos.
Some reporting on Apple's fraudulent practices:
https://www.youtube.com/watch?v=o2_SZ4tfLns
Example of repair:
https://www.youtube.com/watch?v=EDjwYf_GzK0