Yeah, I don't know why people are hating on adventures so much. While it was tough, it was overall a really good game! You're right about it being messed up on how so many people didn't like adventures.
What gets me is that they say Star Fox Adventures is neither Star Fox nor Zelda. There are Star Fox assets in there, like the models, concept, etc. While the idea to the game is LoZ like. Personally, if people don't like Adventures because it is too similar to LoZ, they just hate the series as well as the Star Fox game. It's really nothing to hate on about if the creator made both of the series. Oh well, I won't judge what they think.