You're allowed to contest elections. No one is calling that corrupt. Filing 60 court cases with no evidence as part of a strategy to create confusion and undermine faith in the election system really isn't okay. But it is within a campaign's rights.
What Trump did and has been doing goes far beyond contesting an election. His campaign was setting up fake slates of electors and having them submit paperwork claiming they were real. Some of them even showed up to try to vote. That's blatantly illegal, and that's not contesting an election- that's trying to overthrow it.
Mounting pressure campaigns to get state Legislatures to convene and try to overthrow the results of their own elections by sending out slates of fake electors who weren't chosen by the people isn't "contesting" an election. It's overriding the will of the people.
Calling election officials and demanding that they "find" the exact number of votes you need to win isn't "contesting" an election. It's corruption.
Pressuring the Vice President to just decide not to count certain electoral votes despite being told repeatedly that it's both illegal and unconstitutional isn't "contesting" an election. That's called overthrowing democracy.
And finally, gathering armed right wing, white nationalist extremists, stoking their anger, and sending them out to attack the US Capitol at the exact date and time that the election results were being certified is NOT "contesting" an election. It's a fucking armed insurrection.
So just stop. Seriously- just stop. What the fuck are you even doing right now? Have you taken 5 fucking minutes to ask yourself what happens if we make this the new norm? Do you think your party is the only one who can abuse the system and try to overthrow the government? Do you think that the people who are willing to break every law, to dismantle your democracy, and to literally send mobs out to kill other elected officials are going to turn around afterwards and dedicate their lives to serving your needs and the needs of the American people?
Just. Fucking. Stop.
This isn't a game. This shit is real, and we came fucking close to someone taking our democracy away. And when that happens- they don't give it back. Ever.