I like git a lot and wish everyone standardized on it. I use the CLI almost exclusively but from my perspective it's terrible: cryptic and very inconsistent.

Looking back at my RCS history (RCS->VSS->MKSSI->CVS->SVN->git) I have to say that all of them were either hard to use or plain bad (VSS).

The problem RCSs are trying to solve is hard, that's why the tools are simultaneously indispensible and frustrating.