As aadje93 said, trust is not moderated.
Anything that suggests that you are not trustworthy, and in this case it is the fact that you called him a piece of shit and aggressive and poor man seem to suggest the same thing to me. I wouldn't trust you with my coins, if i was legendster.
You said that it was after he offended you that you offended him... Show us the logs? From what legendster posted here(
https://bitcointalk.org/index.php?topic=1986467.msg19804556#msg19804556) i can't find anything in which he insulted you, apart from saying that he won't pay you $20 an hour...
Remember, he's not on DT2, therefore your trust ratings are not effected by default settings. Don't worry too much about it. And fix your attitude, if you don't like his offer don't force him into accepting yours.
Move this to reputation, please.