The right always acts like it’s some big gotcha “what about Biden/Hillary/whatever”. They don’t realize that most of the left has little emotional attachment to “their” politicians and if anything, a lot of Democrat politicians are simply adequate. Sometimes they’re straight up the lesser of two evils.
But even when politicians are beloved, I don’t think the left is nearly as fanatical of unwilling to change their minds. Eg, Obama in 2008 was huge. He had a massive cult following and I remember being really hopeful for him myself. But he ended up being kinda lackluster. The ACA was an improvement over the then-status quo, but as a Canadian, I always viewed the ACA as a laughably half hearted attempt at reform. And oof, the warmongering? Nobody on the left shys away from hiding that unfortunate fact about Obama.