Stewie's rotten personality is not the thing you're looking for, if you want things getting interesting you should lookout for fer, BadFalleN, Gla1ve, some of the other Blastralis players, kNgV before going psycho mode. These are some of the examples, they have a cocky personality and talk shit. But they are players who have big impact on their teams and doesn't thrashtalk people directly. Stewie on the other hand directly thrash talked a player that is (statwise and practically) better than him and any player on his team (maybe not Elige but is debatable) also thrash talked his team. Stewie is carried by Liquid he is by far the worst player on the team and keeps holding them back if they had a better player who knows how much more they would be winning, tbh Stewie was probably the worst player on that final kek. So watch out because the scene already have the needed personas and Stewie don't have the right to be cocky. The cocky players need to be good the moment they are cocky, like Cold 2017 or Dev1ce 2018 etc. Stewie is also ugly so there you go.