@G-Author002
Yeah, that's pretty much it. The only things that frame Gwyn as the bad guy are the "sealing" of the Ringed City and the creation of the Seal of Fire upon the primeval humans. Aldia tells us he feared the Dark Soul (and, of course, humanity) and portrays him as a power-hungry God who gave himself to the flame just because he didn't want *his* clan to perish in the dark, but then again, Aldia isn't exactly a good guy either so his opinion of the God might have been a little biased.
So who knows, maybe Gwyn actually cared about the pygmies. Maybe he feared they'd lose their minds to the dark once the age of dark began, so he sealed them in a city and tried to find a way for both races to live in harmony... But he failed and in the end thought best to prolong the age of fire, which at least could keep the pygmies and their descendants safe, in a twisted way.
And as much as I like the "Gwynevere is evil" theory, I just can't force myself to see her as a threat. I've always seen her like a powerless entity, which I know is ironic considering she's the daughter of such an important God, but that's exactly the point. She's a tragic figure because she has status, but no power. She flees from Anor Londo with her "husband" but we don't know if he forced her to go with him. I mean, why couldn't she stay and rule the city like Gwyndolin did in DS3? Gender discrimination much? I think so, and I'm not even memeing rn lol. The same thing happens with Oceiros: she has him doing weird stuff to the kids but she can't do anything about it because he's the one with all the power. She just has to stay there and look pretty for the camera I guess :(