Your problem nearly always comes down to the instrumentation of the songs. Nothing wrong with that; you're very sensitive to harsh sounds. I have a similar hang-up about food texture that has resulted in my having a quite limited, bizarre diet for as long as I can recall. But I don't go around proclaiming that peas are real vegetables and asparagus is not just because I love peas but there's something about the texture of asparagus that gives me the willies.
When it comes to country music, you're dealing with a genre that has reinvented itself a half-dozen times (at least) since Hank Williams breathed his last. When you hear processed electric guitars and a hip-hop beat backing Blake Shelton's lyrics about tobacco, trucks, rednecks and "the man upstairs," you're hearing country music in a style that peaked in popularity around 10 years ago. Shelton doesn't record songs like that anymore, and the country music pendulum has swung back toward traditional, which is not to say rock or hip-hop elements don't persist in some songs. They do, but the overall sound is different because popular tastes in country music have moved on.