Aren't you ignoring some obvious things?
The Trump/Russia collusion thing was an overwrought election integrity issue for Dems and liberal media. The media beat on this for over two years and it was great for CNN and MSNBC's ratings. It was echoed by many of the Congressional Democrats. The end result of the expensive investigations weren't very satisfying, but the issue rallied the base. Even before alleged Russian collusion gave them hope of overturning Trump's Presidency, Democrats were wailing that Trump would destroy America. (And I mean wailing. Please don't make me post videos. They're disturbing.)
Interestingly, Democrats in power hasn't been good for CNN/MSNBC's ratings just like Trump in power was not great for Fox News' ratings. Cable news on both sides needs a boogeyman to thrive.
The "evil" Republicans are trying to destroy our democracy is the Democratic flip-side. I'm more cynical of this tactic. This is an good opinion piece below that discusses the hypocrisy and the politics as usual. You don't have to agree with the commentator, but it does raise interesting questions of the Democrat's strategy.
I long for the days when both U.S. parties would just wait for the next election to avenge their losses.
Your characterization here is flawed because there was evidence the Trump campaign attempted to coordinate with Russia in 2016, but they were so inept the couldn't really do it. And, that also comes after a GOP led committee showed that Russian interference and influence helped Trump. That is an unvarnished truth, despite the Mueller report's inconclusiveness (which was aided by Trump's obstruction and promises of pardon's for anyone who didn't play ball with Mueller).
The 2020 election had no evidence of widespread fraud. Trump's plan from early on was to declare victory on election night, and if the votes didn't back up that claim, cry fraud. He telegraphed it. He planned on doing it in 2016...because his ego couldn't take the hit that losing an election brought. So, he cries about irregularities. His fart catchers give him excuses: the voting machines were fixed. Italy or Venezuela tilted the scales. There was mass ballot stuffing. None of these claims have any evidence...

