The easiest way would just play people in roles that don't suit them. Strong defenders should be attacking constantly and the best shooters are your new deep defensive blue liners. You could also start changing sliders to that people with terrible physicals try to hit regularly. Make teams way too aggressive to give up penalties constantly or even have teams pull their goalie ridiculously early. The most fun thing, though, would be to have goalies on the ice playing Center. It would be a complete clusterfuck that would be a ton of fun to watch from the sidelines. Especially when your team is running just fine, playing your players with proper sliders and in their correct positions. It is obvious that your coach is just the better robot when compared to all of the other robots. If you could do things really crazy, it would be fun to adjust the ice for other teams, too. Make their ice really soft or too hard. Just crazy physics things on top of the normal lines sabotage.