In this passage, the character is grappling with intense emotions, feeling the need to transfer his deep-seated hatred from himself onto others. This emotional struggle suggests a desperate attempt to alleviate his own burdens by redirecting his negative feelings, implying that he sees hatred as a means of coping with his inner turmoil.
As he shuts the door to his room, he moves quickly to retrieve a drink, indicating a sense of urgency and possibly desperation. This act reflects his reliance on alcohol as an escape from his negative emotions and highlights the ongoing battle he faces with his addiction and the consequences it brings to his life.