Yeah, so, y'all were right. What If...1602 has nothing to do with the original comic. Characterizations are all off, there's no attempt to work in historical figures (unless you count Rogers Hood, but that's not what I mean), and of course none of the plot was there. There aren't even any slight references to the comic. I can't be mad, this never claimed to be a proper adaptation, but like, why invoke the original at all? Pick a different year, it's not like they took advantage of that specific period.
The thing is, I can just ignore this and go read the comic again. But... The comic has its own flaws that could benefit from an adaptation. I think there is a way to tell this story better, yet the adaptation we got is all just wasted potential. I'm sure it works fine if you're already a fan of the show, this clearly isn't for me.