People that argue that anyone who doesn't understand their one or two letters long variable names are idiots.

I find it really hard to make small, specific commits. I always stumble on unrelated things I want to change.

When people writes commit messages in past instead of present tense.

Would you guys get annoyed if someone(me) made a habit of going through your code and cleaned things up, such as clearer naming, untangling ifs with early returns and so on.

I mean doing stuff that doesn't change the behavior, but makes it easier for the next person.

My colleague does not use git (well, not for much), hates all external frameworks, and when he sees my code he tells me "that's not how I would have done this", every single goddamn time. Aaand we are the only two developers in our company.