People's judgements on music often amount to "The pattern in which your brain releases dopamine in response to music is inferior to mine."

I can definitely imagine coming to love Beethoven's Fugue (which I played in the background while reading this post & comments) because - it's not fundamentally different to other pieces I've come to love. But I seem to be a neophile in many ways, and I've been exposed to certain types of music, so I count tastes as personal and I find the Youtube comments you quote to be ridiculous.

Re repeated exposure: The pieces on an album that start out as my favourites tend to lose much of their appeal before very long, and I might even skip those tracks; pieces that didn't grab me at first become my favourites and keep their appeal for much longer. (I can only think of one strong exception: As a teenager: I loved Rachmaninov's 2nd concerto from the first time I heard it, liked it more as I listened to it more, and continued to love it for years. I still play it in my head to get rid of an earworm.)