Yeah, you are. You can criticize a Democrat for anything. Republicans are above reproach.

Obama was criticized on national news for wearing a tan suit. Trump bragged about being able to kill someone on the streets of New York and not lose a vote - to zero criticism. The man has horny audio about being able to walk through the dressing rooms of minors at a competition he ran and anyone who criticizes him for that is seen as too "partisan".

So yeah. It's not about 4 years difference. Trump could be 90, and his side would still criticize Biden for being too old while running Trump for president.