You don’t get to apply the label “lesser evil” to a president who is backing a literal genocide. That’s not a thing. Past a certain point you’re just plain evil.
If you were to make a list of the absolute worst things a powerful leader can do, genocide and carelessness with nuclear brinkmanship should be on the very top of that list. Biden has done both of these. You can’t legitimately call such a person a “lesser evil”.