I don’t have first hand experience, I just know someone who described a similar problem and then raved to me once they got hearing aids about how life changing they were for that problem.

It sounds like yours were trying to actively amplify certain voices? I wonder if that’s sounds good but doesn’t work sort of feature. Naively it seems like just shifting the volume on everything should work as long as the frequency curve matches the lost frequencies. The brain is what is separating the voices, not the ears.