Weirdly, some versions of the game have her shout more than others. This means she's also some weird software quirk Creator's Pet. Luckily, the sequel had the sense to replace her and her rather annoying voice with another fairy named Tatl who has a less overpowering bell chime.
On the subject of Tatl, there's at least a few out there who found her even worse than Navi, between her grumpy and overly-abrasive attitude ("WHAT?! You don't know about the [x]?!") and the aforementioned bell chiming, which could be just as grating as Navi's voice clips.
Ilia, Link's best friend in The Legend of Zelda: Twilight Princess is frequently bashed on many forums for having no personality, and fans often hate her for her Tsun-tsun moment towards him earlier in the game, claiming that she was overreacting. And then there is the long sidequest to restore her memory that takes precedence over the plot, only to get a rather useless Horse Call when you can already teleport within seconds.
Ooccoo, her son, and the rest of the Oocca. It's not hard to see why, considering that they're grotesque chicken people who caused a lot of Fridge Logic and a Plot Hole or two.
To a lesser extent, Fi, more or less for being extremely unhelpful. She has a knack of reiterating a piece of information said by an NPC literally five seconds after said NPC finished talking, pointing out your shield is damaged or your hearts are low, constantly reminding the player that the batteries in their Wii remote are low, and in contrast to Tatl and Midna, she's cold, stoic and almost robotic. It makes you wonder if the Goddesses created her to prepare one of his reincarnations for Navi. Not to mention how, whereas Navi's Captain Obvious tendencies were at least generally optional, Fi constantly interrupts the player just to point out something obvious, and you can neither ignore nor skip her "hints" most of the time. A particularly obnoxious instance is when she, in the final room of the final dungeon, informs the player that the item they're trying to reach is sealed off and that they need to find some other way to get to it... Or in other words, telling them to do the exact same thing they've been doing for literally the entire game.