OP I'm in the exact same boat as you.
I lost my virginity to an EE prozzy in a brothel when I was 16. I found adultwork when I went to uni and have exclusively used it for sex since. I'm 25 now and still have not had sex sober.
I understand it gets quite tempting, everytime you get the urge you have a near unlimited choice of great women to choose from. Hell I've slept with women I don't think I'd ever manage to get in real life. But to answer your question, there is nothing 'seriously wrong with you' but it is not healthy and you are most likely making matters worse for yourself.
You've mentioned you are shy, and I'm the same, I have deep feelings of resentment towards myself and find it difficult to look in the mirror. In my mind I hate myself and woman could only ever see flaws in me. This is in spite of the fact I know I relatively charming, alright looking and have no trouble holding an arms length conversation with a girl.
There is nothing inherently wrong with large appetite for paid sex but the devil is in the detail. You have started your sex life with paid sex, alright thats fine. However, you've also said your shy and struggle around women in a more natural setting, this has become your go to for sex. Each time you visit an escort your normalising this as a response. You might learn the nature of the female anatomy through this and have a lot fun, but no matter how good the GFE provided you are not learning the finer nausces of women. It lacks real emotion.
Whatever core belief of insecurity that is holding you back is only getting stronger. How do you envision yourself meeting a partner if you can't build sexual chemistry in a natural setting. My advice would be not not to completely stop seeing escorts, you're a bloke and blokes need sex. But you must start cultivating more confidence within yourself and start challenging your insecurities. Just start with something small, give a random woman a compliment, get yourself on tinder and just talk to a few girls, read (Jordan Peterson helped me). Just start somewhere and work your way up because it gets pretty lonely after a while.