Sure. I've worked at Microsoft primarily, and I'm not speaking for all teams but I have a sibling on another team in another org and he has the same issues
Microsoft is incredibly siloed. Each team is essentially their own mini company and they're mainly guided by large top line metrics but there's no top down overall vision on what something should look like. It's like those party games where everyone has to draw a portion of a drawing. It comes out looking like a disaster even if every individual portion is good. This also means that product management doesn't work with any particular team either. You essentially get some random big metric and are told "make this metric better" without any context. Everyone is duplicating work and there's nowhere to learn from
Microsoft Teams is a disaster in so many ways. In the most obvious way, it's very very slow and a pain to use. This subtly hinders teamwork because no one wants to use teams. In other ways, there's no global search so finding stuff in other orgs is impossible. The teams "channels" are essentially shitty forums that are unintuitive to use. You'll never get a channel about hobbies and stuff and even if you did it's hard to find and they're usually dead. Everyone uses private group chats including each team but these have zero discoverability. What this means is you'll never have a golang channel or something where people share and chat about stuff. Most people have a facebook group where they chat about stuff (wild).
Every team has their own onboarding down to what hardware you should get. In theory this allows for some flexibility but what this actually means is that no one has any idea how you should be onboarded and you essentially are sent to flounder until you pick stuff up.
Everyone is doing everything. Every person is their own product manager, scrum master, manager, and also programmer. There's so much duplicated process overhead it's wild.
They have not handled remote well. They insisted on trying to send me a desktop computer. I asked for a laptop and they couldn't give it to me and they instead sent me a used intern laptop. They gave my sibling a used surface tablet. This is a 2 trillion dollar company and they're unwilling to shell out 2k for a basic workstation computer with 6-8 cores and 32gb of ram. Not a huge ask. Also some stuff is only accessible through a direct hardline in the office. Whether you want to use a desktop or not is irrelevant. It's mainly how cheap they are when it comes to hardware.
EVERYTHING has to be Microsoft software for the most part. If you think nih syndrome is bad at your company, imagine you're at a company where they've been making mostly mediocre versions of other software for the past 30 years. Yeah. I'm not a huge splunk fan but trust me when I say the azure equivalent is much shittier.
The pay isn't top notch. In fact it's pretty bottom barrel for a big company and if you can pass the microsoft interviews you can pass somewhere else. Their interview process is also a nightmare. I went through 4 different recruiters and it took me 2 months between passing to get an offer letter. The whole thing was insane. They initially offered me such a paltry amount it made me laugh.
Everyone is a lifer because anyone else has left. Imagine talking to your boss about docker or talking to him about IntelliJ and he's never heard of it because he's been at Microsoft for 20 years.
There's a lot of weird "not racism" but might as well be where certain ethnic groups have taken over certain orgs and speak in their primarily mother tongue despite being in the US in a US based company. It makes teammwork really hard.
You need a separate laptop to log into any production resource. Production resource is a loose term because that also includes int environments and anything on azure. I have 2 laptops and a desktop that I'm forced to remote into it's insane and so slow.
There is no one to talk to about anything. You literally cannot find what anyone is working on or what's happening. Discoverability at this company is literally 0
HR processes are like actually completely broken down to me not receiving healthcare for 3 weeks after I joined forcing me to pay some very big expenses out of pocket that would have been 0 after the fact. Getting reimbursed doesn't work because after the fact those expenses only applied to my deductible which wouldn't have been the case if I paid initially with my healthcare.
Most things are a huge heaping pile of legacy crap that absolutely cannot be changed for backwards compatibility. Imagine working on a c++ code base with no local environment, no unit tests, and the only way it can be changed is to make a change and upload it to a build server (1hr + build times) and then deploy it. Yeah. There's no room to improve things because it's all so delicate.
There's simply so much. Thankfully I'm leaving but it's been ass