Well, the majority of gamers would have to disagree with you, since Zelda BOTW won Game of the Year at the Game Awards.
The crazy thing is, this is Nintendo's first attempt at a true open world game. Could it be better? Of course. It could be a lot better. But for thier first attempt at the Open World Genre, they nailed it.
Zelda BOTW laid an awesome foundation for future Zelda games. It only gets better from here, in terms of Zelda games.
Besides, it took other gaming studios years and years to get thier open world games right, and many attempts. I think Nintendo learned from the others mistakes, and on top of that Nintendo actually listens to player feedback and advice.
Zelda BOTW is an all around great game, with a solid foundation. And I like all the game mechanics by the way, including the breakable weapons. It makes you think before you head straight into battle.