i kid, actually i remember trying to teach him DOA when he got interested after watching me play, and then i learnt that teaching your bro fighting games requires patience that i simply didn't have back then lol
LoL.... I know people like that.... all you need is one match..... Beat'em once. It won't stop him from running his mouth but at least when he does you can just give a reminder.
Reminds me of when a guy at my club beat me at SFV(neither of us had played it before and it was a 3-2 win so it was fair) and he kept saying I sucked and that I was a retard and that disabled people shouldn't play video games (like he just wouldn't shut up about it) so I beat him 5-0 in DOA5LR (two of them were perfected if I recall) and he shut his mouth.