He has no idea how politics operate and wouldn't survive in Washington.
The president "wouldn't survive" in Washington? ...Hmm... you may get a visit from the guys in shades.

I don't think presidents generally have trouble "surviving" in their capitol.
Just from a pure "political spectator" point of view... I'd like to see Trump as president and someone TRY to push him around. In my head, I can't seem to be able to imagine someone bullying Trump or pushing him around. I can see him being 'embattled' or under constant attack from the left and the media, but "pushed around" on his agenda... I'd like to see it. I think he'd make his critics look like fools, as he seems to be doing with ease so far.
I think you stated exactly why many people find Trump an attractive candidate. They want a president that will score a knockout when dealing with adversaries. The problem with this thinking is that being president is more like a game of chess than a boxing match. The real battles occur between underlings at the direction of the president. Public insults by the president shuts down negotiations and break lines of communication.
IMHO, Trump would hate being president almost as much as the public.
I disagree. I think leadership is leadership. Trump has literally made a fortune, lost it and made it back again, playing chess with his adversaries. He's not some hot head who goes off half-cocked doing things to undermine his own efforts. Yes, he can be brash and insulting but you'll notice he is not insulting toward people he may have to work with. He is brutal toward those who are irrelevant.
I think what people are liking most about Trump is that he is his own man. He doesn't have speech writers and handlers, he is not in the pocket of donors or special interests. Yeah, he says some pretty wild and crazy shit sometimes and that could be a problem for him. There is no guarantee this popularity will continue until November 2016, it may seriously drop as people start imagining him winning. For now, it's refreshing to see someone who isn't part of the "machine" in Washington, tell it like it is and speak his mind.
The way I see it, Trump could be a complete disaster as president but he could also be one of the greatest presidents we ever elected. In the past, the uncertainty might have kept me from actually pulling the lever for him... but after 8 years of Obama, I am not afraid of taking a chance. We can't do much worse.