Earlier quoted context omitted.
I run into bugs every day. It wakes, and has a black screen not wallpaper. Change spaces and the focus is wrong for half a second. Login screen is a pain because it collapses all users together. Notifications don’t scroll if they stop scrolling when the cursor is over a gap between them. Something on the system constantly eats disk space, and I think it’s the system updates. If I dock two apps in one space, sometimes…
Unless these problems only started after an upgrade to Tahoe, I would strongly suspect defective hardware in your case.
None of this sounds like a hardware error. Something like notification scrolling is simple bad programming and bad QA. You scroll the list of them, but when the mouse cursor ends up on a gap between them, the new scroll event doesn't apply. They're all individual even though shown together.
Or a black screen on wake - that has the mouse cursor and login prompt, it just sometimes doesn't load the wallpaper or does it slowly. Not hardware - just something buggy. It's unbelievable when I compare to Leopard or whichever version it was introduced the rotating 'cube' of login screens, which always had wallpaper and loaded fast. Here we are fifteen years later with incredibly better hardware and the thing lags.
Same for the rest.