Of course he's not. The only reason is probably really complicated, but definitely has something to him being an ambitionless immature manchild.
But it's not exclusively a Dobson problem.
Normies spout dumb factually wrong shit they know nothing about all the time (like "Batman never killed in the comics"), but they get away with it because they have enough charisma/reputation to get away with it.
The only way Dobson is different from them is that he has no charisma/reputation. In fact, he's extremely obnoxious and a lot of his comics just blatantly say "YOU ARE WRONG I AM RIGHT". Nobody likes being talked to that way. So people are going to nitpick everything he does extra hard, because he brought it on himself.
I suppose, factually, it could be considered sort of bullying. Like, when in school, you're all dumb 12-year old fucks, but you have that one autismo kid who just doesn't fit in, so you almost automatically expect to mock everything they say, even if it's technically not wrong/ridiculous.
I.e. potentially, if a normie said "BTAS came before TDKR", they probably wouldn't be mocked too much for it. But because Dobson said that, everyone still mocks him for it to this day.
Ignorance is the norm I suppose, but some people just have a better way of hiding their ignorance. I don't know exactly how much of it is the fault of Dobson himself, but I know for a fact that his reputation is at the bottom and nowadays nothing he says will ever be taken seriously.