What am I doing with my Sunday?

Writing documentation for work. Unpaid. Because...

a) I made a team member cry because they didn't understand how anything worked and I warned them they were too slow.

b) I'm a team lead, despite asking never to touch management things.

c) The client "moves fast and breaks things". They don't document anything. In fact, I'll get redflagged for "wasting time" on this, whilst doing it in my own time.