One of the big problems for me is that my company installs all kind of nonsense for security that makes the whole system behave strangely. For example, when I click on a window to activate it, it will often jump across the screen. In over 20 years on the Mac, I’ve never experienced this on my personal system. However, it happens almost every day at work. The hard drive on my desktop also randomly disappears and reappears, but only on the work Mac, and it’s happened constantly, everyday, for 6 years. It’s probably JAMF, but I can’t do anything about it. There is a bit of learned helplessness when dealing with my work Mac.
Most of my focus issues are at work, so I have no idea what is a macOS issue and what is an issue with the stuff the company installed.
On my personal Mac and phone, I submit feedback to Apple all the time when things annoy me, since those issues are more clear cut.