Yes that’s precisely what he was saying.
The contrast in the two friendship groups was quite stark.
Charlie’s group were just being supportive. To the point that Casper very eloquently reminded Polly of the differing levels of support Eve & Charlie had both had and to bear that in mind.
Eve’s group however were like the Witches of Eastwick. And Polly’s actions were damaging, not helpful.
Not to mention, if this were a relationship in real life where someone was being abused, then going at the abuser the way Polly did, could make an abusive situation far worse for the victim.