I'm sorry you were disappointed too. No game appeals to every taste. But frankly, I'd be a lot more sympathetic to your position if you hadn't by your own account completely finished the game, which takes a considerable amount of play, and were also familiar with the earlier versions which are quite similar in overall style of play.

To me, that's a lot like walking into a restaurant, eating every last morsel put in front of you from appetizer to dessert, then finally announcing that you didn't enjoy the meal and you want your money back. If I was the restaurant owner, I wouldn't give you a refund under those circumstances.