Although I like hot sauces for the most part, I really don't like Sriracha sauce, nor do I get all the fuss over it. It burns the crap out of my mouth, and the flavors don't taste balanced at all. It's not even just the heat thing, the whole flavor profile of it seems kind of off to me for some reason.
I've tried to incorporate anchovies into my Italian recipes, since it's supposedly adds a lot of "umami" like flavor and blends in. Honestly, I don't care for it, especially on pizza - it's way too overbearingly salty and it sticks out like a sore thumb for me.
This is a little more obscure, but there is a Worcestershire-like marinade called Old Colony Sauce (it's a Pittsburgh thing I suppose) that I hate. If you look at the list of ingredients on the back, it reads like someone raiding their fridge and pantry for a little of this, a little of that - and the end result is pretty gross. Again, not balanced at all, and it has a distinct and annoying smell to it when cooking.