I find Windows to be an unholy confusing mess these days. Want to set the microphone sound level; go to sound settings - nope, not there. Probably in some other legacy control panel I guess.
By contrast, most things I need to configure in Linux are in a single place. File copying is much faster than Windows. Updates don't prevent me from working and require multiple reboots. It crashes less often.
Anyway, a lot is probably just what you're used to. I'm sure I excuse many Linux failings because it doesn't bother me and I know how to work around it.
Most other open source projects have people behind them who don't put UX first, and who are suspicious, jealous, or plain disagree when people want to help with UX.
This shouldn't be too surprising in a world led by people who value technical excellence most.
I mean there is even a playstore-like "app" to install softwares
I really don’t get this. All modern desktop environment (OSX, Windows, KDE, Gnome) looks like very similar in terms of user experience quality to me. All are different, true, which is why I can understand will exists. But I will very hard pressed to justify "actually, x is better than y" (yet alone "light years away"), for any pair (x, y).
Can you name just three deal-breakers, things so huge that they deserve that "light years away" judgement ?