Trump didn't lose scores of court challenges.
The courts refused to hear the cases.
There is a difference. No evidence was presented in court, no arguments made, and you can't lose a contest that did not happen.
I would absolutely love to see even one fully considered case, complete with discovery and evidence presented by both sides, but I don't think that is going to happen.
Looking, however at undead Joe Biden, go ahead and try to convince me that 80,000,000 people voted for him, especially considering the hundreds (not tens of thousands or millions) riveted to the screen for his live feeds.