I agree the CLI can be a pain, but it's slowly improving. It's in a better state now than it was a few years ago. For example

    git push origin :topic-branch

can now be replaced with

    git push origin --delete topic-branch

This still has issues, there's now multiple ways to do the same thing. There's also different commands (git push vs git branch) for the same action, deleting a branch (regardless if it is remote or local).