My parents weren’t mocking but completely minimized and ignored my issue and the pain around it l, and eventually labeled me as “too sensitive”—I knew early on I was completely alone in my stutter. Even with only that, their emotional neglect really destroyed my confidence and set me on a path of expecting rejection all around. What helped were good friendships and good relationships that validated my emotions and allowed me to see myself as more than my stutter. I don’t know how deep your family dynamics hurt you, but you might be carrying around more pain than you think (although, only you can tell, of course). You might want to learn about scapegoating in families and narcissistic abuse. Peter Walker is a good resource, IMO. Again, I don’t want to impose any diagnosis: you might have found good way to cope and distance yourself from your parents’ frankly messed-up handling of the situation. I offer this just in case it resonates. I’m sorry you didn’t get the emotional support you needed and deserved.