It really sucks. Honestly the only way to fight it is to have people who dont buy into the bullshit rally around him. So long as he still has avenues to post and share his content and build up a fanbase and garner financial support, they cannot completely defeat him unless he gives in. It sucks and I imagine the sudden loss in income hurts but honestly if he were to resume making videos like normal he might be surprised how much of his support returns. The best way to damage cancel culture is to pile up as many examples as possible of people who survived the attacks.