I have worn Hearing Aids for 15 years now and I couldn't manage without them.
I think you need to keep persevering as your brain will get used to the increase in sound and it will not seem so bad after a few weeks.
I never had a problem with itchy ears until a couple of years ago, when every few months I had an ear infection, which meant a trip to Doctors for a spray. This went on for a couple of years, and now seems to have settled down again.
My Aids have a button which I can press to decrease the sounds, or another button where I can cut out some of the background noise when in a restaurant or pub for example.
My partner was given Hearing Aids about 6 years ago, tried them once, decided everything was too loud and never wore them again. He is 68 now and I constantly have to repeat myself
I recommend you wear them constantly, or it will be hard to get used to them.