I don't think it's a drove of trolls. I think it's one person with tons of alts who strategically inflames the naturally existing pressure points in a group in the hopes of--my best guess--driving people away from that group. Tensions and differing opinions do exist in heterogeneous communities such as this one, and even among lesbians whose common denominator isn't a shared ideology after all, but just a bio-social reality. Most people--sane people--who find themselves in philosophically diverse spaces know that in order to maintain a pleasant and collaborative atmosphere it's best to highlight those tensions rarely, if ever, and with a light touch. So that's one reason why a specific type of "grievance" post raises red flags for me. The other reason is that this is a known pattern of ((that one user)); it doesn't require much stretch of the imagination to think that this subsaidit and perhaps even this site aren't the only places he's trolled.

So that's my $.02. I won't keep trying to convince you, though, because your points are valid as well and all either of us can do is speculate anyway.

"Women should only date women because men are terrible"

Genuinely curious, do they actually say this? I mean, you're right, that is consistent with some radfems' beliefs, but I always thought the bisexual hatred came more from a place of insecurity (about being left for a man) or jealousy (resenting the fact that bisexuals have more options, one of which is more socially acceptable).