“the only legitimate and acceptable way for the 2020 election results to be overturned is for state legislatures to decertify and then re-certify their election results, forcing Congress and the Supreme Court to resolve a constitutional crisis”
Nah, this wouldn’t work because it wouldn’t actually create any crisis to resolve. The states only certify election results to confirm a slate of electors, and the Electoral College has already voted, and won’t be voting again until 2024. So decertification at this point would only be a symbolic gesture and wouldn’t actually change anything.
Short of going to extralegal remedies, the only feasible route now is impeachment, if we can get the votes.
I suspect that it cannot be known that the election of Biden was fraudulent and that he can remain in office.
Something would have to give.