Try something else you've never done, like Frontlines. Find a circle of friends to play with, friends make even the most monotonous things seem bearable especially if you talk about random stuff or just plain goof off.

If I hit a brick wall, I just go play something else on the side so I don't get completely burned out.

But if nothing is "fun" anymore, it might be time to move on and come back later after another patch or preferably when entire servers stop tripping each over over hunts and actually start doing other things other than ST and hunts.

You'll just get more and more frustrated as time goes on playing something you want to be fun but actually isn't.