In those instances there are no constitutional methods in place to deal with them. In this case the Constitution specifies a joint session to receive the certified Electoral votes from the states. A court cannot throw out a candidate since he has not been elected just his electors have been.
You are not thinking about this within the logic of our constitution. We did not just elect Zero we elected ELECTORS. They are qualified to vote. They are not qualified to vote for an ineligible candidate.
Remember in 2000 when the Democrat grandstanders made their speeches at that meeting trying to keep Bush from being acknowledged as President? They wanted to disqualify Bush’s Florida electors. That is where this will come up.
Now there may be some grounds for suing the State certifiers if they certify Zero when he is ineligible.
And there may be some case to be made after he takes office perhaps the Court could rule that Congress allowed an ineligible person to take office.
It is clear from all the floundering around on this that there is no clear path ahead here.
Don't assume too much.
You do not need to explain the electoral college to me. I understand it perfectly well. The Electoral College cannot violate the constitution or the citizens’ constitutional rights anymore than a sitting President or congressman or judge or your next door neighbor can.