I made a contribution to him b/c I do think he belongs on the debate stage. But as I've heard more, I find him to be lacking in substance. He oversimplifies issues in order to pander to Republicans and in doing so erases needed allies.
For example, when he talked about Republicans presenting their values and winning on values and implied that Dems have not done so, I have to say, wtf is he talking about? Whose party's values made it possible for him to marry? Which party made it possible for minorities and women (and yes, LGBTQ) to believe that anyone can succeed if they work hard? The Democrats. We won those debates. Republican values led to Trump. He speaks in a way that placates what cable news wants to hear, but it's not what represents our actual reality. Pete uses his intellectual gifts to run straw man arguments. That suggests a lack of intellectual curiosity and substance to me.
There are just a lot more candidates out there who are far more accomplished. I don't need to settle for Pete.