If it was just critique, people wouldn't be genuinely planning not to vote for him, handing Trump the win. It's textbook cutting off your nose to spite your face.
I'm certain there are some who feel like it's just people who don't care (and in most cases, they're wrong), but the rest have such a myopic view of the world—they're gonna be the ones to stop Biden and remain morally superior—that they forget there's more at stake than just Gaza, such as LGBTQ rights to exist, freedom from religion, and continuing democracy.