Do you have any specific questions? The request for "what's wrong with Apple software" is about the size of a Wikipedia page to answer and what people are saying in the comments seems quite clear to me. Since you're referring to comments, but none in particular, I'm not sure what parts you want an elaboration on. It might also help to just ask in a thread that has information you find unclear

Example of bugs, posted last month on HN: https://www.bugsappleloves.com/

It has become very buggy in recent years. Lots of glitches. And the liquid glass fiasco didn’t help.

Historically there were so few bugs in Apple’s software that to encounter even one was a jarring experience. Now they’ve reverted to the mean, and it’s just as buggy as Windows or Android. So if you’re comparing with them, no big deal. But compared to Apple standards we’ve fallen a long way.