I got to watch more than a few new comics the other night. The problem I saw repeated with most of them was simply they didn't have any single ideas to their stories and thoughts. Across the board most needed to load up on more singular funny ideas.
Everything sounded as if it ran on into the next and on into the next and so on ...and into the next....;) There has to be highs and deliberate lows in your speech, starts, restarts and stops.... as well as energy to your tone.
I know there's a saying that stand up comedy should be 'conversation not persuasion', but for gosh sakes at least give me a tone that sounds like you mean what you say.