Has anyone else encountered extremely toxic/gate-keeping people in the Poly community?

I'm part of a FB group that's for advice on Poly relationships. I posted with some background about my triad and a question on how best to communicate with my two partners without sounding like I was completely blaming them for everything (because I was at fault too). I wanted advice on how best to go about bringing up certain topics in a way that would promote a discussion about them without immediately starting an argument.

Most of the comments were people telling me things like:

"You should just leave them. If they can't communicate, then they're not worth your time."

"It sounds like they've already broken up with you without telling you."

"Leaving them would be the best because if they can't communicate perfectly, what's the point?"

I don't understand how most of the commenters felt it was appropriate to tell me to leave my partners when I specifically told them leaving was not an option at this point because we are brand new to Poly and communicating the way that is needed would take time and some growing pains that I fully expected and accepted would happen.

Do most Poly people just expect perfection in their relationships? Do they just expect communication to be perfect off the bat and if you don't have that seemingly perfect communication of a mind reader that it's not worth it?

Because that seems awfully Mono to me. The whole idea that the one who you truly love will just snap understand every want and need of yours within the first five minutes of meeting you or it's not worth it. I don't believe in love working that way. I think love is about continuous growth within each and every relationship (whether romantic, friendship, or sexual) because people do not stay static. We are ever evolving creatures who's wants and needs change and if we love or care about our people, we would change and grow with them.

Am in the minority for thinking this? Am I the weird one for believing you shouldn't just cut ties with people the second communication is not absolutely perfect?

EDIT: When I say "Leaving is not an option" I do not mean it in the way it probably comes across. As though I would never break up with either of them even if they abused me/cheated on me/etc. I mean it as leaving shouldn't be the first thing everyone thinks of when you have a small bit of relationship/communication problems. Things should be talked out first in a respectful and mature way. Perfection should never be expected.