Being one-shot by the apprently-light class of the game (scout) isn't fun,
Nor is dying constantly by the same sniper who seem to have perfect aim again and again and again and again,
Nor is getting killed randomly from a stray enemy grenade when I'm running on the sidelines,
Nor is getting killed by a pyro AS a pyro in less than one second at full health with him barely suffering from my backburner.
I think that's pretty much it.
EDIT: I forgot front/facestabs.
Nor is dying constantly by the same sniper who seem to have perfect aim again and again and again and again,
Nor is getting killed randomly from a stray enemy grenade when I'm running on the sidelines,
Nor is getting killed by a pyro AS a pyro in less than one second at full health with him barely suffering from my backburner.
I think that's pretty much it.
EDIT: I forgot front/facestabs.