If the "democrats" did seize power fraudulently then a real leader would not sit around playing golf waiting for the courts (which he claims are "in on it") to fix it.
He'd take action, he'd have refused to leave and would have ordered the military and other resources to prevent the country being illegally overthrown by an unelected democrat president.
What di Trump do? ran away, fell silent for hours while his supporters did all the hard work and then he abandoned them and drove away and cried like a baby.
THAT is how we KNOW he lost the election, his own actions are totally inconsistent with what a true patriot president would have done if the election had been a fraud.