It's found within the support structure.
A person goes to a place to vent, where everyone who is already there came for the same exact reason -- they're going to commiserate through agreement. Everyone who cheats is considered disloyal, but in a place designed to support people will sing a different tune.
I would agree that MALES ARE PERPETRATORS/WOMEN ARE VICTIMS is not the double standard it seems to be, but I am not sure Alphaboy was calling it a double standard either. I think we've all seen enough examples of women ruthlessly turning on one another, even while supposedly supporting each other.
These groups can be nasty vicious, but of course they would be. Consider their mood, and then consider how long it goes. A break-up is a temporary thing, the feeling should work itself out. Meanwhile, a support group online is a permanent fixture to a temporary problem, and "OG" members will never heal because they constantly reinforce the above narrative, even though they know and we know it ain't true.
It should not be very confusing that emotional wrecks are not the standard example for any gender.
They give love a bad name!