honestly they all possess the worst traits of many of the factions without possessing any of the positive qualities they may or may not possess.

Imperium: To speak against our word is heresy and you shall be punished for it

Tau: Our cause is for peace, so we may commit any atrocity in the name of our goal.

Orks: They're not very smart and come in endless numbers.

Tyranids: Once they've destroyed where the arrive they just pack up and move onto the next victim

Eldar: they're elitist douchebags

Chaos: They promise freedom and power for following them, but really only want you as their puppet.

Wait…does this mean SJWs are Chaos?

I'd think they'd be more like the Tau. "Yes, all are welcome with open arms into the ever-inclusive Tau Empire, but if you're an upstart colony of white, male humans, we just might sterilize the lot of you in the name of the Greater Good."