Almost no one cares. The lesbian undertones and overtones don't bother me or most people.
What bothers me is the smug sense of heroic righteousness; as if the cartoon was being created in 1930's America or modern Saudi Arabia. People want to believe that they are heroically fighting a bigoted system by creating or liking SU. So they greatly amplify any speck of hatred that they can scrounge up to feel like a hero who is taking serious risks.