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.