I'd say Skyward Sword was the worst, if only for the huge amount of hype it failed to live up to and some hilariously questionable decisions in its production. Questions like, "Why do I have to get into this awkward position to throw a bomb?" or "who thought it was a good idea to make a LINEAR zelda game?", or "if they were going to make a story-based game with supposed chemistry between Zelda and Link, why didn't they hire writers that could write?"
to me, it's just a lot of questionable crap like that which ruined the experience, not to mention the motion controls, outside of swordplay, basically turned into "The Legend of Zelda: Stick-Waggling minigames". Had the controls been motion-optional or more fit for my setup (I don't have the room to stand up while playing games, as my room is small and I don't share my consoles with my room mates), Skyward Sword went the way of Kinect: Great but useless technology.
but yeah, lots of little things made me hate Skyward Sword. The poorly written dialogue, the failed attempt at romance, the linear nature of it, the motion control minigames, and God, that stupid, stupid, STUPID FUCKING RETARDED STUPID SWORD DEMON THING. I'd take tingle over that joke of a character ANY DAY! "There's a 93% chance you should hit the enemy's weak spot!" FUCK YOU WHATEVER YOUR NAME WAS YOU USELESS CLUSTER OF DATA!
My Console Library:
PS5, Switch, XSX
PS4, PS3, PS2, PS1, WiiU, Wii, GCN, N64 SNES, XBO, 360
3DS, DS, GBA, Vita, PSP, Android