I want that oompa loompa to get crushed so hard he can’t possibly argue it’s fraud.

Unfortunately I don’t think that threshold exists.
If Trump got absolutely crushed and Harris hauled away 90% of the vote, Trump would absolutely cry about how suspicious the numbers were.
He even won the electoral college in 2016 and he still cried about how the Democrats cheated and demanded a recount because Clinton won the popular vote.
He’s going to cry foul no matter what, even if he wins.