Abused his power?
Yes, I would say that pardoning your own son as president is a conflict of interest, unethical, and an abuse of power. It demonstrates that Hunter is above the laws that Joe Biden helped architect. I’m surprised that this sentiment is so controversial.
You’re absolutely right that they dont fight dirty enough. Hiwever, I’d say that Democrats lost largely because Kamala was too cowardly to distance herself from biden and his awful policies. She lost because she chose to court moderate Republicans (who gave her the finger and voted for the fascist. Big surprise!).
Biden pardoning his loser son does nothing for the most marginalized folks who will have to deal with Trump’s fascist regime in the coming year. It’s not a good look that the only time Biden “fights dirty” is to serve his own interests.