Your loss of frequencies happened over time. So your brain had time to adjust .. there likely wasn't a sudden difference which would make a true comparison much easier.

A bit of a false comparison is that you are saying commercial music sounds fine and comparable to yours .. well yeah, it should, as you are listening to the commercial music with the same ears, so I would expect this result (see above) .. your brain has had time to adapt.

You didn't go into detail on the hearing aids you bought; do they adjust for your frequency deficiencies, or do they just make things louder?

I personally have a slight dip at 5-8 kHz (nowhere near the 30 dB you mentioned) .. but I am aware of it and use meters to visually make sure I don't over adjust 'for me'.

My best friend bought very expensive hearing aids that compensate for his frequency loss (much more severe than mine), which I've thought about doing, but over time I've realized his hearing aids may be 'over compensating'. So I offer no advice there.

Your best bet is probably to let other people listen to your stuff and get input, then guide yourself from this input with all things considered (including your known loss). And use meters to verify.

It ain't going to get better (hearing doesn't do that very well). But you certainly can learn to deal with it and adjust.

I do not work here, but the benefits are still awesome
Make your sound your own!