I’ve not been a fan of the Liquid Glass changes, but it’s similar enough that I’ve been able to get used to it.
Fluent on Windows doesn’t look too bad but MS hasn’t made particularly great use of it and parts of the OS still don’t use it.
GNOME/Adwaita get some things right, and other things wrong (the padding everywhere is way too thick, its crusade against menu bars is odd). It’s also so minimal that it makes macOS look maximalist, and as such isn’t my cup of tea.
Gnome is the only linux DE that tries to be consistent (probably due to more centralised decision making). I think that makes it most likely to be most user friendly over time.