If they’ve done that then fuck it, take the members list of every single member of the chapter, contact them all, organise and migrate to PSL. Continue work exactly as before under them without skipping a beat.

Don’t hesitate. Don’t think “but it will just reinforce their factionalism accusation”. Don’t worry about loyalty you are NOT party members anymore(exactly what Corbyn did hesitating to fight labour after being kicked out). Just fucking do it. No hesitation.

The entire fucking org should do it anyway. The org has dud leadership and they are mechanically irremovable, this makes it an entirely unsalvagable org. Every single member that wants to make a successful org should migrate to the one that does not have these flaws.