Hey, better mute your profile comments, if you don't want grifters...
Seriously though, Rivals is full of trolls and hacks, in addition to people just mainlining DPS. As for the tank comment, I do that on purpose as MK, because his projectiles bounce and it helps charge his very much hated ult.
Read my review if you want more of my thoughts or my blog entry about matchmaking algorithms (has nothing to do with main topic of the month EOMM).
Player numbers have been dropping considerably lately, this'll likely soon crystalize into a small community of actual teams that apply teamwork and random rage baiters.
Also, good job on getting almost all the achievements, now do that with Enter the Gungeon, you're welcome to read the wiki.

gg knife fight

+rep Good player

+rep chill nice guy good trade, didnt actually trade but hes nice and seems fair

+rep nice trader ;)