> Explorer loads instantly, etc. Even search is performant and gives decent results.

There is likely too big of a gap in "terminology".

For example, the file explorer startup is so "Instant" that even Microsoft officially added an option to preload the app to fix the delay. But if you don't notice / don't appreciate real instant, then sure, you won't understand the complaints. (or maybe your hardware masks it well enough)

Similarly, if you've never used Everything or better file manager for search, you might get used to the bad search results and call them "decent" since you're not aware how awesome it can be