It's too late, you are a sesbian robot. Fortunately for you, you are far enough away from the Nation's influence that nobody cares about you being with a gestalt gf. Aside from, well, the gestalt in question, of course.
there are several things wrong with that exchange and the drama but i think for everyone's sake it's best to ignore all that and treat this as just a neat name connection and nothing more
If you say the Hades version of Hestia is bad, you're wrong. If you say the Hades version of Hestia is good, you're also wrong. If you say you like or dislike the Hades version of Hestia, you're right, whichever it is. Same with the DanMachi version. Taste is subjective.
I do kinda agree that the Hades-version of Hestia is a little...unique, but I wouldn't say that Danmachi's is flat-out better.
Using a design from a anime harem show as comparison, probably wasn't the best idea either... But in general when people say (from both sides) that one fanfic design is better than the other fanic, you both lost the argument.