Wow, that's rough! But you have to understand that not everyone's hearing is the same. It seems to me that many women are much more sensitive to high frequency brightness than men. My wife used to complain about my system sounding too bright when I thought (or wanted to believe) it was just fine. I found that when I toned down the highs a bit with careful component matching that she no longer finds the highs offensive and can sit and appreciate the music with me. Before I revoiced the system it would drive her out of the room. Also, once I had a female audiophile friend over for a listen to a new phono preamp. To me the unit sounded a little bright on certain recordings, but acceptable. In her words, it sounded "brighter than the sun," and she couldn't take it. It sounds like your girlfriend may be very sensitive to highs and what you consider alright makes her crazy. If you have a way to roll the treble off in your system, you might want to experiment with that and see what her reaction will be.
I wouldn't trash the relationship over differences in aural perceptions. If you experiment, you may find a balance that you both can live with. If not, just don't ask your girlfriend's advice (or take her comments to heart) regarding the sound of your system.
I wouldn't trash the relationship over differences in aural perceptions. If you experiment, you may find a balance that you both can live with. If not, just don't ask your girlfriend's advice (or take her comments to heart) regarding the sound of your system.