This sounds so much like a RL job 
On topic, as casual I long ago stopped “competing” in anything in game. I get what OP means though, if I had to pug Normal amd M 0s I’d meet the toxic people he speaks of. But I avoid pugs like plague, except random bgs where I find the communication least toxic of all other pugging.
OP, there is a community (Alliance) Scared of Dungeons EU EN - #41 by Sinaaki-doomhammer
They raid Normal as far as I hear. Give it a try maybe. I consider too, but with my a bit odd playing time I am not sure I’d fit in there.