LOL! @Kamaji
"...unfitness for office".
Uh... snap out of it, pal! 2016-2020 are in the books!

They are indeed, and they, too, demonstrate why he's unfit for office.
Trump loves to claim the credit, but he's rather shy on actually managing to accomplish what he takes credit for. Everyone loves to bitch about McConnell, but the fact is that the three conservative Supreme Court justices were his accomplishment, not Trump's, along with the Federalist Society. The 2017 tax reforms were Paul Ryan's accomplishment, not Trump's, despite everyone loving to hate on Ryan.
As far as Trump's own efforts? Where is that wall? He couldn't even manage to pull together a coalition when he had a GOP-controlled Congress for the purpose of getting legislation passed - largely because he contented himself with pissing off the people he needed for that coaltion because it got him applause from his core supporters - and so he tried it with an executive order, which was promptly undone by Biden.
Trump is the antithesis of someone like Reagan, who quipped that one could get a lot done if one didn't care who got the credit; Trump prefers to take the credit, and isn't too picky about what gets accomplished so long as he gets the credit.