Well, a couple reasons why I left, even though I was headed somewhere on the server.
1: Ignorant, annoying players. Although I didn't take a screenie every time one of the players made a racist comment, or tried to attack as many people personally as they could, you can ask a lot of players there, it's not the friendliest community.
2: Corrupted staff. This one I surely did take a screenie of. It's the one thing I can't stand. The racism, the insults could all be dealt with, but the following pictures are proof of their corruption. Dawn is their Admin. Although I don't have proof of it on this computer, he also planned on taking 50 dollars from a player, promising him a position on the staff, and then banning him. Whether he went through it or not, I didn't stick around to find out.

3: Inexperienced, Immature staff. One of their higher level GMs was abusive of his powers, and provided nothing back to the community. Yet, he kept a position of power, and authority. He would constantly @doom and @raise Prontera while we all tried to run. No, it was not an event. No, it was not provoked. It was random. Their Admin, Dawn, would also randomly put a gravity field on us, draining our health until we died over and over again. He jailed a bunch of players NOT for an event, spawned a Satan Morroc, put on the mode that makes you drop items upon death and logged off. This was one of the legits of the Admin, Dawn, being.. I'm not sure:

4: Lack of punishment. Even with all of the racism, insults, etc, etc coming from some select players, he didn't get rid of them because, "All of those idiots are potential donators for the server."
Those're the main reasons. I could pick at every little thing, but there's my review. Nothing positive I could think of except that I kicked donkey at PvP, and WoE.