He HATES that he lost to Biden and so desperately wanted to beat him second time round and now he’ll always have lost to Biden and never won, so he’s really struggling to accept that reality and desperately wants to go back to beating Biden in the polls.
This is absolutely how he would behave if he were in Biden’s position right now so he thinks this is plausible and people might believe it.
He wouldn’t recognise altruism if it turned up in his house with free burgers every lunchtime singing “Altruism is doing something nice for someone else with nothing in return, nothing in return, nothing in return. Altruism is doing something nice for someone else with nothing in return, nothing in return, nothing in return.” He would like it, and he would tweet about how the hamberder people were good people, great people who know how great trump is, but he wouldn’t understand and wouldn’t learn anything because it’s so alien to his way of thinking. Of course he finds it incomprehensible that Biden might not be seething with rage right now.