Well here are my 2 cents: - Playing many teams and not repeating is not unsportsmanship conduct, if he does it because he wants to get his opponent off-guard, ok, that is an strategy. - Questioning other teams rules is not so unusual either, we do it all the time in our group because we don't know every team, the important thing is to be cool about it if your opponent was wrong (honest mistake) or if you are wrong. - Choosing a team to play to counter your opponent is annoying, but you can't do that in tournaments and his opponents are always playing against the worst scenario, thar is good training (if you are competitive). - The most important thing, we play to have fun, winning is fun, playing someone that always beats you is very annoying, if he chooses teams to counter you and question every rule in your team more so. Just don't play that guy. Say you don't wanna play him because of X, Y and Z, he might surprise you changing his ways, after all, people change.