As well as the flag shagging and the neo-liberalism... as well as his obsession with saying they've moved on from Corbyn.... as well as him being the 'architect of Labour's Brexit strategy'... I'm still genuinely surprised how badly he has done. As johnson descended further into the pit of squelching dishonesty there was a niche there for someone 'solid and honest' or similar. But he's just fucking awful, not just uninspiring but far worse than that. He actually looks frightened when he speaks, or there's something going on in the eyes. Labour had a long way back from 2019, but it's been a fucking field full of open goals since then. His personal appearances are shocking, not rebuilding or connecting, just standing there looking wooden.
Labour's real problem is they are a handful of points up in the polls, so no real pressure on him. But any kind of analyst or Labour version of the men in grey suits can see the party has no identity and isn't rebuilding with working class voters. But given that we are not going to get a vote of no confidence in him, there's just about no scenario for him to be replace before the next election.
edit: Well, perhaps, if this standards thing goes anywhere, but it's unlikely.