Tactful ways to inform people that they're playing badly?

[SerLuke]

You're overreacting.
But please do go on about how its ok for a level 76 AST to only heal, and not use over half their kit, or how it's elitist to expect them to actually use divination, attacking spells, or cards.

I’m over reacting because I’m saying it’s not okay to hate people for not playing a video game up to par? What’s wrong with you?