Your error is that everything in this game, including PvP, causes you to level. The entire game is "just leveling" period. Just because you don't like it, doesn't mean it's not PvE content. Just because this PvE content does not appeal to you, does not mean this game is PvP centric.
The PvE in this game is meant to be incredibly casual "pick-up-and-play" focused, with emphasis on playing with your friends, rather than on competitively racing through challenging content to be the most elite of the elite.