Why is /m/ so fucking shitty compared to /a/?

It's a complete anomaly. Normally the smaller the board is the better, but /m/ is filled with /v/tier discussion. There are retards ready to jump on you for any reason whatsoever like /v/ does with its RAGE shit.

I've seen as much mecha as the average person on /m/ and share their taste but the entire board is filled with spastic autists.

Why are containment boards always so shitty?