I think the "taint" is real enough, though it "taint" what the Trump Crime Family is bleating. There is no way Trump actually got 71 million votes. I doubt he got anywhere near that. His enablers rigged the election, and were so confident of their success that they failed to destroy the evidence in a timely manner. That is why Trump is denying access to the government and information related thereto for Biden (or any other non co-conspirator). You can bet they're busily covering it up today, but I doubt they'll do a thorough job of it; once they are forced to abandon their rat's nest and the actual cleanup begins, at least some of the truth will be learned. It might not come out right away though, as casting a further pall upon the state of the Union isn't really in the interest of the incoming administration.
I haven't seen any evidence that suggests that Trump could have had additional votes for him manufactured. Have you seen a credible source for this?
Obviously Trump/GOPs have been working to suppress democratic votes, especially for minorities for years. I would believe that if not for those efforts Biden would have gotten more votes than he did if not for voter suppression. It should be illegal for people to have to wait in line for hours to vote, reduce polling locations to create those lines, reduce access to ballot drop boxes, poll taxes and etc.... And Trump's stooge at the USPS was clearly trying to make it harder to cast absentee/mail-in ballots which would have and were more heavily for Biden.