Git is terrible.
Git is typical of a tool built by engineers. It has good primitives but a clunky overall design and horrible UI. It does not naturally encourage the most effective modes of use. Hell, even the "best practices" of the git community are highly questionable (just rewrite history for aesthetic reasons, what could go wrong?).
Git is highly tuned to the use case of serving linux kernel development. Many other folks have figured out decent ways to use it effectively as well but don't mistake that for Git being an unquestionably good tool or for it being "easy". Sure, the core workflow is pretty straightforward, but the fact that the easy stuff is easy is not a ringing endorsement of a tool. Good tools make hard stuff easier and easy stuff trivial.
Make no mistake, I think there are lots of awesome parts of git, the most important being its distributed nature. It's trivial to setup a repository because everything is a repository. That's pretty potent, and git has some reasonably well engineered components inside of it which make it fast for many common use cases, which is fantastic. But a big part of why git has been so successful lately has been because it hasn't had a lot of competition. Much of the competition is either hugely expensive (perforce, TFS), doesn't match the use case (same), hugely outdated (SVN), or terrible (TFS). The main competition for git is Mercurial, and a big reason git won out over Hg is because of mindshare traction and network effect from linux kernel development and then github.
The biggest problem now is that so many git fans are afraid of criticizing git's shortcomings.