Stopping you there. It's your responsibility to find people who work well with you. No one else's. You and I both reach the same conclusion in that method from opposing view points - play with people you know, limit your interactions with those you don't.
Another thing we can agree on: Toxicity is an attitude. Both extremes are complicit and implicit in this, and there are players of all performance levels that are toxic. You don't get to blame one group or another for that trait.
A toxic player who performs well is useless and painful to a group who's struggling and learning as they'll ridicule, posture, and waste everyone's time arguing.
A toxic player who performs poorly is useless and painful and wastes everyone's time by arguing and not seeking to improve.
The dominating majority of players are in-between these two extremes and are just frustrated by their experiences with these extremes. In the typical bad situation they'll see these extremes in normal, every day people, who are just trying to get by their day with a little less stress.
So, try being human with one another first, and see if that makes headway. If not, then find someone closer to your needs for enjoying the game.
As far as accusations that people 'dumbing down the game' in the face of those who seek a challenge - I'll be blunt. You're in the minority, and this is a number's game. The decisions made as far as the performance levels and content difficulty are made by the designers of the game and not us - and dollar signs will always hold greater weight than your or my opinions. They'll go with what keeps the game healthy from their perspective - regardless if one or both of us agree.
As far as skill goes. I tend to prefer more reaction based gameplay than rotational. I have attention maintenance issues I struggle against which does not serve me well for long rotation cycles, so I try to maintain a rhythm and fit it within the context of a fight. That's my compromise. I can't speak for others, nor should you. Most players I've encountered on all ranges generally do try to improve without added pressure, but will hiss and spit under scrutiny. Seeking to understand your peers is part of that networking skill that players seem to think they don't need in social games anymore.