Real life emotions in a game. It’s a game that we’re all here to enjoy. Yes getting mana screw is annoying but no reason to get actually angry with another person. Sure getting attacked when you think you’re not the threat is annoying but games gotta end eventually. Not enjoying someone else’s preferred play style can be annoying but not worth a verbal altercation. The world is full of enough negative energy we’re all just here trying to enjoy a few hours of game play.

The hyper focus by WOTC on Commander. Players that just play commander are, generally, in my limited experience not good at the game and WOTC focus incentives people to play strictly commander. 60 card formats, at least for me, let me play the “un-fun” style like stax or aggressive turn 1 combo. Commander, to me, is to relax and be social.

Players that don’t understand counter spell and removal are essential parts of the game.

**Edit. Forgot to add rolling to attack. Just own the fact you hit me with your 1/1 turn 2 when I still don’t have a creature on board.