Not the OP, but I've daily driven a Model 3 for several years now and have a list. It's not a huge list, and some of them aren't unique to Tesla, but a lot are.
Problems that I think are unique to the Tesla:
Even after 4+ years of driving, I still hate the door handles. They require so much more dexterity than "normal" car door handles. You gotta aim your thumb at a quarter sized spot, then push in so that your fingers have a chance to catch the lever before you pull your thumb away. Normal car doors are stupid enough that they could be opened by a lobster. When the Model 3 handles freeze (which happens where I live), the user manual instructs you to hit the handles with your fist. Like a caveman. How about real door handles?
The entire top sheet of glass spontaneously shattered while just sitting in my garage. I was sweeping the other side of my garage one afternoon when there was what sounded like a gunshot. I looked over and saw that the top class window had just fully cracked diagonally across the entire pane. There were no rock chips on its front edge (a common precursor to full shatter), no kids standing on it (a less common precursor). My best guess is that the body of the car warmed up in the garage after coming in from the cold, but the glass itself wasn't yet warm enough and that was enough to cause thermal expansion that was incompatible with it wanting to remain whole. Cost $1500 to replace, and Tesla refused to cover it under warranty, claiming it was not a manufacturing defect. No appeal, no second opinion. Also, it was during covid, and it took 7 weeks for the glass to arrive. So for 7 weeks, I had a very big, open, sunroof.
Then there's the UI. This is my single biggest gripe. Parts of it are objectively terrible.
The part of the UI that tells you how fast your car is going is, compared to the rest of the UI, microscopic, and rendered in a grey on white background. It's not in your line of sight, which requires you to turn to look at it. I figured out a hack though - let someone else, like my wife, tell me when I'm speeding. That only works when she's in the car though. When she's not in the car and tells me I'm speeding, I tend to ignore her.
When you're stopped at a stop, there are dancing grey car and truck models all over the place. There was a tiny old Toyota pickup truck next to me the other day, and the UI wanted to simultaneously render it as a traffic cone, a big box truck, a motorcycle, and then a sedan. It never could make up its mind, and decided to just place it sideways growing halfway out of the model of a box truck that was meant to represent the Toyota Corolla that was in front of me. What's the point of devoting more than a third of the UI to this endeavor? To show me how wrong the computer always is about what's around me?
Here's a fun one that made it to my list super early into my ownership experience: sometimes the UI will reboot while you're driving 75MPH in the middle of rush hour traffic. That makes for some serious puckering, even if it's happened 10 times before. No worries though, after driving blind for about 2 minutes it comes back online.
One time, it came back online to the "romance" app, showing a lovely fireplace and adjust the fans to gently blow warm air on me to set the mood. I was not in the mood. I was using the route navigation to get me someplace. Instead of knowing what exit to take, I was enjoying a warm fire. On an August afternoon in Los Angeles rush hour traffic.
Then there's the Autopilot experience. Not Full Self Driving, but just Autopilot. When you're using it to stay within lanes, it'll aggressively try to center itself in the lane, which is good for staying in the lane, but if you pass an onramp, and the right lane line vanishes for that onramp to merge into the lane you're in, the car will violently align itself between the left lane line, and the onramp's right lane lane. It'll happily do that whether you're going 20 MPH or 100 MPH. I don't use Autopilot any more.
When I go to work in the morning, while backing out the overlays that show your rear and side cameras will appear, but imagery from the cameras will often take over a minute to appear. But not always, and it's that part that's the most unsettling. Why be slow sometimes and not others?
Let's talk about the front trunk latch. Is there an actual trick to close it the first time, gently? I still don't know how to best close it. I don't think I'm alone either. Yesterday while at a Super Charger I saw two different people trying to close their frunk at least 3 to 4 times each. One of them even got into an argument with their passenger for how best to do it. I rarely use my frunk anymore because I hate trying to close it.
What's crazy to me is: despite all of what I just said, damn I love driving it.
It's why I think Tesla is stupid for not pursing a bare bones, "dumb" version of the Model 3. Give it physical buttons, no driving assist fluff, real door handles, minimal glass. I'd trade in my current Model 3 for that, no question.