I wasn't that much of a fan of Double Rainboom I thought it was a bit over hyped, Dont get me wrong it was watchable, But a bit meh. But even if it had been an official episode why would you leave the fandom over it, People say they are leaving all the time over the littlest things. Alicorn twilight leave the fandom, Things going wrong at the convention you are attending leave the fandom, Rainbow dash dose litereally anything and they leave the fandom. Frankly if someone says they are leaving the fandom I only have one thing to say to them. Good bye!