Man he butchered a great Beatles song. He needs someone in the studio with him to restrain him. With the right guidance, he could have much better recordings. He doesn't let the songs "breathe" enough and tried to jam too much into the spaces.
If you listen to his early stuff, he had these moments of brilliance but played to the song more. His tones were cleaner too. The quality of his recordings is the biggest travesty though.