Like, if you remember what Walz was like when he first started, he was really going in on the "weird" label, making JD Vance couch jokes, and was really making himself visible. And people really liked him.
Then we saw reports of the campaign having ex-Hillary staffers saying they want to stop using the "weird" label, because it's too polarizing (the one attack that was really getting under their skin).
Then afterwards, Tim Walz was barely visible and mostly milquetoast. At the VP debate, he was uninteresting.
Early on, the Republicans were trying to attack him, but the only attacks they could come up with are stuff that say more about themselves than him (Tampon Tim, the whole "he's weird because he hugs his children). But then they didn't even need to attack him.
The Democrats absolutely hate winning, part X.
I think people generally overestimate the effectiveness of the "weird" thing for actually getting votes. It probably goes over well with the loyalist democrats, but those are already going to vote for you anyway. I don't think it does anything for disaffected liberals, or dissuades lukewarm Trump voters, Trump is just too likable of a weirdo for it and now seems even more anti-establishment.