Was there this much complaining when Ivy, Harley, Harper, Kate, Holly and Renee Montoya all came out as gay or bi?
It's been pretty strange that most of the women in the Bat comics are gay or bi while until very recently there's been no prominent non heterosexual men.
There really is no pleasing people. If a new gay character was introduced people would say there was already too many Bat characters. There's always a reason why this isn't the right character to be LGBT, this isn't the right time.