I think it is more fear than shame. I certainly see that in the teens I work with if they rarely go to confession. The teens that regularly go seem to look forward to it. In both cases though, they all have a real joy when they exit the confessional.
True Reconciliation story.... When I was in college, a friend went to Reconciliation and got yelled at by the priest because she, like me, hadn’t been in years. (Both of us are recovering Catholics). She walked away from the confessional without finishing it. She nor I ever thought twice about doing that again.
I have no problem about asking God for forgiveness. He already knows how screwed up I am. I do have an issue with the being judged by a priest part. Most priests fall far short of the high standards set by Papa Bergoglio.