What would you like to see changed?
I'll opine: git's sense of semantics seems to rival JavaScript's ("sure I'll add an int and a string"). I checkout branches but also checkout files to undo unstaged changes, but staged changes are a reset. How about "undo" as a word people would understand? Nope, doesn't do anything. Can I get a log function that shows the commit history by default? And when I check out a branch it says I'm up to date with origin/branchname but it's lying because that's just the local copy and it hasn't done a fetch. And of course in 2.0 they didn't try to clean anything up, they just changed a few defaults.
I think I deserve a medal for understanding enough git to get by. Specifically, a purple heart.
I would be delighted if the same level of developer-friendliness were present in other pieces of our toolchain, most importantly in our version control systems. I routinely feel that while we have version control data structures suitable for the 2010s, the user interfaces on version control systems are about two decades behind where they should be.