That's because the anti-Biden propaganda coming from Russian bots & alt-right astro-turfing is effective.
The astro-turfers are everywhere (including the fediverse) , and a ton of them present themselves as "concern trolls" since it's a little harder to identify them that way.
I recently asked a "I'll never vote for Biden" person here on Lemmy why, what goal does that accomplish? And boy oh boy, their answers were flacid, goal-post-shifting non-sequiturs. I never replied but someone else took up the torch, and I've never seen a conversation more like 2015 gamergate anti-feminists. Just garbage after distraction after red herring.
Rather be edgy than let the sophist's slick words draped in patriotism and liberalism distract me from a horrific monstrosity that has left over 30,000 people dead - mostly women and children.
I swear in 10 years, once the backside to fascism has seriously taken root, the libs in this comment section will still be hooting and hollering over these empty words in the State of The Union - all the while doing every mental gymnastic possible such that they don't have to question capitalism. Enjoy the backside.