Never understood why people got to bitch about stupid stuff, if something isn't your cup of tea, there's no point in attacking developer when you can in most games either ignore the thing or just go on and play other games. Best guess i got why someone would hate character like Nea to the point of attacking developer, is that they are so bigoted that they can't stand when others have likes of their own and possibly bit self-hating for actually finding the character something that draws them in, which goes against their own self idea that they are 100% straight only. Bit like those religious nutters that hate gays because their religion says to do so, while secretly fancying them.
(Just to point out, this message is not in any way targeting specific individuals. But if you felt insulted or attacked by this condemnation of people who attacked dev because they had trans-character as one of the big LIs, you might want to think about why you are so toxic and can't let people be themselves)