Anything Atlasssian. Jira, Bitbucket, confluence. Just frustrating to use, poor UX, and slow. Business types love them however. AWS. It’s UI is honestly baffling, it feels and looks like someone made it in a rush with jQuery and Bootstrap years ago. It’s login and identity and resource management is confusing, and apparently you need a chrome extension which adds a bunch of complicated options I don’t really understa…
Once you wrap your mind around what commits, heads and remotes are and learn to rebase you get an incredibly simple and fine-grained control. I never use stash because it's trivial to create a WIP commit and rebase later into the chunks I want to ship to permanent history.
Git is like a chef's knife: extremely powerful tool that's dangerous in untrained hands.