If it's not working for you and you aren't shooting it enough to feel comfortable using it, sell it and move on to something that will suit you better- or get something else and keep it as a backup. It makes no sense to me to continue with something just because you happen to own it currently.
I have used the Hogue slip-on sleeve as well as a piece cut from an inner tube with my Kahr 9mm's- PM9 and CM9. Both helped increase comfort. That might be all it takes to help you be able to shoot it more.