Trump lost because :

He couldn't keep his mouth shut
Failed at COVID leadership
He believes he's the smartest person on the planet
He would not take advice from people actually smarter than him
Alienated a large segment of the public
He thinks he should be King of America for life

Angry and bitter that he lost re-election, he will torment America (and the Republican Party) with his tweets for the rest of his life.
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NO STEP ON SNEK