What are the reasons behind Bidens current Ukraine choices?

I think Biden is making choices to intentionally destabilize this situation even further. I am by no means a general but I do know that Russia hasn't been exactly doing well in this war. I understand that getting North Korean troops involved changes things but, honestly, not by much.

The sudden authorization of technology that directly escalate the war there is intentionally done to create a problem for the Trump admin. If there was benefit to it, I think it would have been done sooner. We know Russia is likely not going to be able to back their choices on Nuclear Policy but I don't think the choices being made are helping the situation.

Politics aside, can someone point to a valid reason, at this point in the war and current administrations overall involvement in it and the change moving forward, that this makes sense for that region?