I knew Feather Bangs was going to get intense hate from the moment I saw him. Not only is he strikingly similar to Justin Beiber back in his earlier teens, but he's also voiced by Vincent Tong, our "beloved" Flash Sentry.
Honestly, I hate neither Feather Bangs nor Flashy. They are both parodies - the show is merely poking fun at a cliche that only the older members of the audience would get. They knew we wouldn't like Feather - that was the point, he's meant to be a joke. Besides, both Feather and Flashy are genuinely nice, albeit in a cliche way, and Feather was quite cute at the end of this episode.
They were created to annoy. They did their job and Vincent Tong delivered. Good on him.