I think this is just a bizarre opinion. He’s the leader of the opposition, with a huge deficit. What do yo expect him to do? His ratings are well above Johnson’s, the Labour Party is well ahead of the Tories in the polls and that gap appears to be growing.
I’m not sure what you expect him to do. He was ahead of the curve most of the way through the pandemic, Labour were saying the govt should do X, the Tories said they shouldn’t, then did X two weeks later. He only went behind Johnson when the vaccine bounce happened and there really was nothing he could do about that.
I’m curious, what do you expect him to do?