Sorry this is happening, but I think Momentum has done it to itself. It was trying to be too much. It should have stuck solely to what it was set up for which was helping the Labour to be socialist, and get the party elected, by lobbying members and organising canvasing. It sounds like you are having the same problem the Labour Party has with the NEC. Stupid people with their own agendas willing to trash the organisation for their own ends. Get out with all the other true activists and work with the CLPs for the next round of elections. These are really the only things that matter in the end. Momentum is about to become the worst kind of media fodder against Labour and Jeremy.