As a commercial OS, it’s fine. LTS releases, great headless experience, and dependency graph that is progressive but not as frozen in time as RedHat.
As an end-user OS, the dizzying number of ways to get usable apps into the GUI cut deep against advanced users. Especially when advanced use cases smash into incompatibilities and easy-to-make mistakes that break stuff. But if you’re willing to rock a lot of defaults and just slap things together from the package manager, it works okay.