It's the lack of leadership amongst the TRA's/incels that is tripping them up every time.
At the moment the TRA/incel 'leadership' appears to be Frances Coppola, India Willoughby, Monty and Alex Sharpe. Monty and Sharpe, both of whom, particularly with the 'art' Twitter threads and in conjunction with VICE have pretty much put the boot into the TRA's well-and-good. Jones is rapidly losing interest, Maughan is suspect because of the attack on Nick Cohen just as he was laying into the Tories, and everyone else is going radio-silent.
None of the above though have sufficient traction or sense in any case to be able to detect when the route being pursued is actually going to negatively impact on their cause. And if they did, they've no means to challenge or confront the nutters.
'Cos the key problem with the TRA's/incels is that no deviation or questioning is allowed as that is instantly regarded as traitor-behavior. So there is no restraint, no self-policing, and no consequences, even when 'double-agents' are hard-at-work undermining their cause. So Brighton could end-up being a horrible, cause-ending event for the TRA's/incels, but no-one would be able to try to suggest a re-think.
The last of the 'moderates' left ages ago, leaving just Coppola, Willoughby, Monty and Sharpe manning the online fort for the TRA's/incels. And whilst extremists themselves, they can't match the extremists in the real world who themselves are dependent on support from some Chief Constables and the Mets' Commissioner.