Went to a large event, big team of people. I got on great with everyone. Later, a guy joined the team. He'd been to a few previous events.

Guy is a total grade A douchenozzle. Massively overweight, balding despite being late 20s looks in his early 40s. Lives with his parents works a dead end job on customer support for a telecom company. He is a total sex pest, basically harassing women constantly, touching them, hugging them, trying to give them massages or teasing them like a school bully - literally pulling their hair type shit. Brags about his house even though he lives in his parents basement (they live in a very nice property) and talks about his job as if he runs the company (he is a peon). He talks loudly and pisses people off all the time and is always talking to women about their problems.

Saw people, girls and guys, a couple of times telling this guy straight up to fuck off with some behaviour or other.

However despite these incidents many people seem to like the guy and are oblivious to how much of a fucktard he is. Even a guy that told him (seriously, not joking) angrily to fuck off and get out of the room was joking with him again a bit later. Perhaps to try to make sure he didn't damage the relationship.

For some reason he decided to try and AMOG me, and I wasn't sure how to react since this guy seems to command some respect. I wasn't at the event to hook up nor was there anyone I was interested in but he made a big thing of trying to one up me a lot. I tried to placate him by just praising what he said but I could tell he still felt massively threatened, possibly because I hung around with a young cute girl a lot that he was hitting on constantly and I shrugged and left him to it as I wasn't trying to hook up with her.

Normally with AMOGing I will either ignore, act beta/supplicant to them (and only them) to just get them to ignore me, or try to use their own alpha ways against them which is fun and enjoy it even if I don't win.

But I had no idea how to deal with this guy. I wanted to straight up say what I wrote above but obviously that wouldn't work. I need to crush this guy but I straight up have no idea how. I've never met such a colossal douche in my life. I will end up working with him again at future events. I want the guy to straight up leave me alone or to crush him so people really see him as the total loser school bully type of abusive dick that he actually is. Any advice for handling this type of person?