I expect you have gone now PageTurner but in the UK we regularly say negative things about our Prime Minister and others in office. We don't equate the prestige of the position with the person who holds that office. As far as we are concerned they all have faults - and some many, many faults (just think back to any PM here!), and we are often full of anger and exasperated with them.
Thatcher, Johnson, Blair, May et al have been on the receiving end of vitriol from people both left and right. Corbyn, who wasn't even PM, has also endured hateful comments.
America is clearly a great country but is is very divided. Like the UK there is a massive gap between the most wealthy and the poorest. These divisions make it hard to see only the good in a place - and I say this with sadness as I lived in America when I had young children so feel a great fondness towards you. One of my children was born there, met a young American here in the UK and has now made it his home. I am invested in America through him.
Two of my very dearest friends here in the UK happen to be American - and I still have two very close friends from my time over there who I love - so it not as though we hate everything about America.
If you are still here, please understand, the comments you read on Gransnet would likely as not be the same if he was our PM. It has nothing to do with his office or his country, except that when you hold high office, we expect more of people and are often (some say usually), dissapointed.
Did you follow the Brexit debate here? Did you read the comments about our leaders in that debate? Did you see the crowds marching against the government about the Iraq war? Many of us still feel deceived and angry with Blair about that.
Please PageTurner don't think the feelings about Trump extend to the whole of America. From this side of the pond, he is not percieved to be representative of the ordinary people, even if he is currently your figurehead.
Finally, the different attitudes can be seen in the way our ex-PMs revert to their names after they leave office. America goes on calling their ex-presidents "President" I think this is a conflation of the person and the office. Rest assured, many of us love and trust and have lives bound up with America. I don't think you should take negative reactions to this one person, Trump, to heart.