Explain this to me

Have you ever noticed how people use "fishy" as a reason for not liking fish? E.g., someone will say, "yeah I'm not a big trout fan. It's a little too fishy for my taste."

What the fuck does that mean? How can you not like something for doing its job perfectly? This toast is just too toasty? I had to send my hamburger back because it was too meaty? No one would fucking say that shit.

Have you heard the new Stones album? I don't really like it. I think it rocks a little too hard.