Surely the content of what he says is the most important thing... if you agree with the content of what he says then vote for him!
Batghee I prefer to look at what he's done rather than what he says (though I don't like some of what he says, either - and I'm as left as they come).
He claimed to be a Remainer, but was in reality a Leaver too cowardly to be open about it, and instead just constantly sabotaged his labour colleagues' Remain efforts.
Inside parliament he put a three-line-whip on Labour MPs to vote for triggering Article 50, and then did a lot of performative nonsense, calling a rally outside parliament to oppose Brexit. Who was the rally demonstrating against? Himself for voting for Brexit? Who knows.
Most of the time when we've been crying out for a swift, decisive opposition to the awful things the bloody Tories do, he's either feeble, or late, or absent altogether.
There's no point in him saying all the nice things in the world if he's either unwilling or unable to deliver.