Pelosi privately told Biden polls show he cannot win and will take down the House; Biden responded with defensiveness

Also, she was racist.

You say this as if Pelosi isn't in a similar boat, leading the sinking ship she refuses to get off of because she'll have nothing to do and no one to boss around anymore.

All of the DNC leadership are there in their 80+ glory. Constantly in the way of actually winning by making the decision they want in a vacuum ignoring the real world, and further ignoring everything that happens after that point. They did it with Hilary, they did it with Biden the first time (only winning because Trump clearly let millions die from COVID, and even then it was still somehow close). They just expect Dems to vote because the alternative is worse, instead of giving people an actual reason to do so, and are always surprised by the outcomes.

The DNC made their choice last year and it was never going to be different. The only reason they're talking about it now is because the debate that was never going to be a positive for Biden in any universe, was handled poorly, to the surprise of no one actually paying attention.