Agreed, but the reason this is done to him from my understanding is that he does this sort of ad hominem attack on others and is a bully, generally, so why shouldn't people point out his superficial flaws as well? Especially when he continually tries to rewrite history that none of this happened because his ego is so fragile?
If he was a standup billionaire (heh, oxymoron there), people wouldn't feel like attacking things like this were acceptable.
But because he's a gigantic douchenozzle who regularly bullies people for things exactly like this, including his own family, it's game on.
They're intentionally saying this to cast doubt and challenge the election results, no matter how badly they lose.
If we can't get some of them to turn their conspiracy theory around and establish faith in our fair election process, then we're going to be dealing with this forever and ever.
Bush v. Gore was the end of democracy for us it turns out. That set a precedent we're not able to recover from today.