Hm, maybe that part is more polished, but I don't use it. My pain points are very basic stuff, quickly opening a file explorer, finding files, copy paste, navigating folders. It all improved, but still feels awkward and is way slower (takes more clicks/key presses) than in linux or windows.
I have never had any problem with any of those things on any OS I have used. Pin the files app to your taskbar, boom, easy access to files and folders. Hit the circle key and type in the launcher box to search. Copy paste is...identical other than Ctrl vs cmd?
ChromeOS is fine. I wish they hadn't given up on Steam and models with dgpus, but I prefer playing games on a Switch these days anyway.
How can I copy a filepath?
How to go to a specific path? Not by clicking on the filepath like I can do in other OS.
(Apart from that, most of my hate comes from the early days of chromeOS, where the file browser was really, really slow. Doing cd and cp in terminal was blazingly fast, but in the filebrowser the same operations were crippling slow (on different devices), so much that I learned to avoid it. That bug/unoptimal implementation (?) got fixed some years ago and in general it improved, but it is still no joy for me using it)
Edit: I just intentionally tried out some things with my chromeOS device, and noticed many pain points are still there, but the file explorers "search" improved a lot. I allmost like it (more than that of windows file explorer)