Well eventually he's a mere puppet of the regime like thousands of others, which has always happened during any time in history. There's nothing new under the sun. He's not really deciding anything, just playing a role as actor. I get the sentiment, but the regime and in effect Satan wants to elicit this reaction from us of negative emotions and hate towards him. I see him as a mere puppet that's in the shackles of Satan like all of us, albeit in a different position, so in my view we should hope the best for anyone. If anything I'd personally feel some type of negative emotion and hatred for is the people at the very top that are the source of all the things we see around us, but I acknowledge that's a dark path to go down to and doesn't help myself, so I see it in terms of the spiritual warfare between God and Satan, truth vs lies, good vs evil, and not so much person vs person. I've noticed much more peace of mind after letting go of the latter.
He still chose to be that puppet. As if someone will be able to say on judgement day, "I was just a puppet my lord, it wasn't my fault!" Biden sold his soul for earthly power and riches and he will have his rewards.