Exactly, fuck him for existing. We can make up backstories for ponies that have grace and dignity, but Flash has the opposite of that. Trying to give him a backstory is like trying to get everyone forget about Equestria Girls, when we can simply make new characters for better outcomes. Why fix something that's completely unusable when you can get a new one? I may hate Flash, but if there's one thing I don't like more is that he exists and people are wasting time trying to "fix" him, when there are better uses for time like making another character.