Sure, fighters and sports games are THE most competetive genres of games. Everybody, including me wants to win. But if I lose, or even worse, get my ass handed to me with a perfect loss I'll swallow it. I'd never quit before the final blow or curse at my opponent for beating me, even if he was cheap. In the end it's my fault for losing, if you're prepared and focused enough you can outwit a cheap player anytime. Mock him a bit by chosing the same character and using imitating his offense

I had the same guy fighting me via fight request in SF IV. We had about 20 fights and while I cycled through all the characters after matches he kept using Ken and did the same offense over and over. After about the 6th or 7th time I chose Dan and did the same. Which infuriated him quite a bit that a supposed inferior character, with inferior moves dragged his Ken all over the place. He then gave me some sweet names and quit mid battle. Good times

I found that player matches are more relaxed. Like me they usually just want to get some good matches rolling, win some, lose some, just having fun. It's still about winning and being better but players in ranked battles are way more dogged and usually the most competetive and sore losers/winners.
In any game I usually only play ranked for achievements and once I have them or figure I won't get them I'll only do player matches. It's way more fun that way. Multiplayerachievements (apart from co-op play) suck anyway but that's another story...

Cervantes is a very popular character because he has powerful moves and is quite easy to learn. However, against my Ivy matches can go either way but usually tipping the scales in my favor. That's what you get for relying on the same 3 moves over and over
So while I'll probably can't avoid certain characters or disrespectful players in fighting games, I can at least decrease the chances of running into these guys
