People get very passionate about video games, and I think it's important to take a step back and acknowledge that what is important to gamers is not a one-size-fits-all shoe. While many might react to this as "it's stupid romance crap with no bearing on gameplay, who cares" for many, the aspects of narrative, character building, and romance are of critical importance. It's easy to say that one gamer's worthless fluff, is another gamer's sole reason for playing, although neither stances alone encompass all possible viewpoints. We do no favors to anyone by reducing a section of a fanbase down to some witty insult. People develop attachments to fictitious characters across all media, and care about what happens to them, and the relationships they have, and when something unexpected happens to a character they care about, they have strong reactions. I have no doubt there may be some rather base homophobic rejections to this particular case, but I also think that it's just as likely that people are having a strong reaction because the character's canon is a major departure from their expectation, and in a game like Overwatch where diverse characters are so prevalent, the shipping community is bound to be rather attached to it's many possibilities for establishing their own "one true pairing", and to have any pairing canonized is bound to have backlash. Overall it's a healthy symptom of a franchise that is doing something interesting.