I like Amarillo, but I do completely understand where you're coming from. I brewed an ipa with simcoe, and there was something majorly off with it. It eventually mellowed enough to finish a bottle, but when it was still fresh it was rancid. It was what I'd imagined was the garlic/onion flavor.
Then I tasted a beer at a competition that had the same flavor in it. It was brewed with mosaic, which is a daughter of simcoe.
Everyone has different preferences. No need to feel bad about it.