far from an expert myself and still learning but it is annoying the amount of 'non team' players there are, they race around following the ball with a 'BALL --- HIT BALL---HIT' attitude while leaving the goal wide open, then you get the nutters that constantly play the ball back towards their own goal, both these actions almost always lead to a goal against...i have had players simply 'jump' every few seconds so they do not get kicked for being static, i have had players practice flying, i have had players just drive around the arena walls and many that start a game and do nothing.
great game and great fun when a team actually works together, one goes forward and someone stays back with one picking up in the middle seems to work well but rare to find that mix and far too many just want 'the glory' of MVP and will chase the ball over to get the last touch on a goal even though it would have gone in anyway.
being stuck in a game where your supposed 'team mates' are doing little to nothing or one after the other end up being replaced through lack of action is annoying because also leaving the game will get you punished.