Slow's only interest, I believe, is in upsetting people who are rational by claiming the world if flat. When you argue with him logically, he wins. He needs negative attention. He's does not care what the truth is any more than taking a contrarian position. Part of self hate is the feeling of insignificance, that one is invisible, which can be offset by negative attention. Slow needs to know his feelings of worthlessness are imaginary, inculcated at an age when he couldn't possibly defend himself.