You can be as irritated as you like, its a free country.
Do you really believe that the entire Presidential trip will go without amythhing that irritates you? What do you think the odds are of that? You are predisposed to being anmoyed by Trump, do you agree?
As far as differentiation, has there already been some action of the President in this
G20 summit that we need to dissect and determine as "decent/reasonable" or otherwise?