'He is either capable of understanding what is going on and deciding, or he needs advisors to decide for him. '
It is both. He has already decided to take the Establishment on and end their game, but he has advisers who feed info to him that he then decides if he agrees with.
'Trump, OTOH, is clearly unrestrained in public. '
Absolutely. Trump is completely fearless. Teh Establishment and world leaders have never ever come across anyone like him, he is not a "bought and paid for" politician and they can't control him. He is "unrestrained", he said "the shackles are off" and he is coming for the crooks and they know it and are panicking.
'your attitude that it's fun and it's a finger to the establishment is rather sad when you think that international security and economic prosperity (to include the UK) is at stake'
No because Trump will sort the crooks out, he will prosecute them, he has said so in public to their faces and he will smash Isis within weeks if not less and he will bring peace and make America great again and make it work for the American people. He is going to smash the globalists and end their game. He already told them
"We will no longer surrender our country or its people to the false song of gloablism"
They are desperate, he will beat them.