This is very common for alcoholics/addicts when they get sober. Like has been mentioned emotional growth stops at the age the substance starts being abused. A massive part of recovery programs such as the 12 steps of AA is about working through this and accepting life as is. For me I had to deal with stuff that I’d never worked through at 14. It’s painful but it has to be done to recover.

Recovery for me as well as many others who I know well has been simply about growing-up. Losing the ego which is often rooted in childish emotional responses.