You are playing too damn loudly to train anything. If your practice with stuff that you NEED to work on is louder than a standard metronome, you need to fix that problem - not create further ones. Playing loudly adds a measure of force that limits the fine motor skills to clean up our act. Playing loudly also confuses our brain with all sorts of additional information that prevents us from fixing problems.
Hearing loss has nothing to do with it. If you want to get better, you need an approach to accomplish that goal. If your rhythm is not solid, loud will only make the repair much more difficult!