Because you're kind of a manipulative dick?

Which… is kind of weird. Was this episode just Discord being an ass for the sake of it? Usually whenever he's screwing with someone, there's a reason behind it.

I'm still not really sure what this episode was trying to do…

Ending was kind of stupid and it would have been better if Discord hadn't been a dick just to make Twilight feel jealous. I think, writers were going for him trying to teach Twilight a harsh lesson, but in the end they missed the mark a bit.