You can use similar logic to make an assumption that anything is false. None of the issues you mention above are straight forward as you indicate either. For example, Trump was never exonerated pertaining to Russian disinformation. In fact, Muller, a Republican, repudiated the idea of exoneration, but he did say a sitting president should not be charged.
On Democrats “lying” about Biden’s health. This involves more assumptions. I think many Democrats were surprised about how bad he performed and I think if Biden’s handlers understood the extent of his decline he never would’ve agreed to a debate. Declining health also increases with age. So what is true now was not necessarily true to the same extent 6 months ago.
But regardless of any specific circumstance none of the above has anything to do with the fact that despite numerous lawsuits and third party investigations, the most solid evidence we have on changing the election came from the guy who lost it. That’s the truth.