I feel bad because he was so young. That's about it.
He screwed up way too many times. Last straw was not protecting Clementine for me. We all know had Clem been armed at that point (not sure if she knew how to shoot yet,) she would have tried to protect Ben. She thought highly of him.
Went downhill from there. Felt like punching him myself when he said he was responsible for the whole bandit thing and what happened to Duck and Katjaa.