At the beginning, you can't choose character class.
No beginner Character customization - like, 2 pairs of shorts and a few hairdos? Gay.
Scams - People scam you out of masos or what ever they call maple dollars.
Constant grinding - Unless you include advanced party quests, Nothing exept grinding is in this game.
Horrible quests - You are spending tons of time doing a near impossible quest for an item 20 levels below your level, and worth so little money that it's not worth it. This is for people who are trying to break the monotony of grinding.
Nexon - Nexon may be the cheapest game company of all time. They even made a quest that, without telling you, would change your appearance so you would buy nexon cash to fix it. Hell no, that's when i quit playing the game.