Wouldn’t be the first time. He held on tight to his grudge against Esther after she well meaningfuly scuttled his relationship and never let go. He even tried to set it up so their roommates would fight over her, that plotline simply fell off.
Hes always been an angry hate filled man, and never grew past college because he never felt he had to. The Solver Squad started nudging him out of his shell, he recognized he needed help, but their betrayal has caused him to weld his shell shut and put on spikes