Mostly the UX is inconsistent. Git Koans [0], which is now 10 years old, still holds mostly true. I do feel it has improved, though not in ways I've bothered to use. `git switch` for example, was introduced at, uh, some point because `checkout` is so overloaded.

Anyway, git was the first and only VCS I ever learned so I don't really see the big deal myself. I didn't learn all the internals super well, but I generally did just learned it. On the same token I've never really heard of a VCS that people don't complain about. Except Mercurial.

[0] https://stevelosh.com/blog/2013/04/git-koans/