The culture you were born into may very well be rotten, but don’t make the mistake of thinking that it’s the culture of “this landmass”. The USA is enormous, and contains a huge number of cultures and subcultures. I grew up here, too, and experienced nothing like what you describe.

Live the rest of your life abroad if you’d like, but don’t do so believing that everyone in the USA is from the same culture.

As someone who is close to the aphantasic end of the spectrum: for me, it does not apply to audio. That difference is how I came to understand aphantasia better: I can very concretely hear sounds and music in my "mind's ear" in a way that I can't for vision.

I have no idea if I'm anywhere on the spectrum, but I really don't visualize images, but I can definitely hear sounds in my mind's ear. Not smells, tho. When I dream, it's almost no images. It's feelings, with a story associated. To the extent i do have images, they are very washed out, basically no color or detail.