u/Flamingflamingo1268

I've been an MLP fan since childhood, but because I didn't know the episodes were available on YouTube all I had were my DVDs. I've been going through each season on YT for the past few months, and I just finished Zephyr's first appearance (S6 Episode 11 - Flutter Brutter) and my question is, why does everybody I've seen hate him? Sure, he didn't do anything for himself at the start, but, like everyone else in MLP, he learned to be a better person. Is there a later appearance that everyone hates him for? If so, can someone tell me without major plot spoilers?