American politics being what it is, and the GOP's tendency to project being what it is, I think it's possible there's all kinds of dumb shit that went down with this election in various places, on either side. If we're gonna talk about vote machine manufacturer sketchiness, there's been weird stuff and controversies surrounding ES&S since at least Bush/Gore in 2000.
This cartoon always comes to mind:
That said, the specific claims being made don't really make sense or pass muster, they are regurgitations of debunked right wing talking points which are being echoed not because they are true, but specifically to undermine people's faith in the electoral process and pave the way for some millions of people to regard Biden as illegitimate for the next 4 years. This demographic will have a
heavy crossover with people who thought Obama was a secret Kenyan Muslim -- remember, Donald Trump is the original celebrity Birther, and one of the reasons the whole Birther thing was ever more than a crackpot conspiracy theory. Trump's administration has normalized conspiracy theorists and brought them into the party fold; the party will need to eject them, or become increasingly illegitimate, misguided and insane. Hence stuff like:
GOP Rep. Dan Crenshaw to Marjorie Taylor Greene: 'Start acting' like a member of Congress
If there was evidence of massive fraud, multiple GOP state legislators, secretaries of state and governors would not have died on a hill of certifying their election results -- and Trump projected
loud and clear that he was going to claim voter fraud and take it to the courts no matter what if he lost, for months. As it turned out, his efforts to do so were pretty pathetic, because he's burned most of his bridges with smart people so instead he has Rudy's Rally Down By The Dildo Store.
Not even Trump is really trying to dispute that he massively lost the popular vote this time; also, it would be pretty weird of the DNC to have the power to rig the election for Biden but decide to just lose all the downballot races and toss a bunch of house seats and not grab senate control. Smoke and mirrors, tools of distraction.