I think your suspicions are wrong. Yes, there are plenty of less competent people in history, but not to this level. Trump is an imbecile who just happens to be good in one direction (bullying and manipulation). Put him in an escape room on his own and he'd die in there. While I can think that many previous UK leaders have not been genius-level, I can't think of one who was anywhere near as stupid and beligerent as Trump. Other than maybe Liz Truss, who is thick as two short planks, but fortunately was ousted quickly. That won't be happening with Trump, and the US (and the larger world) will pay for these pocket-lining morons' mistakes.
George HW Bush, Reagan, Nixon, Andrew Jackson, George Washington. They all did horrible things and their incompetence or evil led to widespread suffering of people most of us have forgotten.
Ditto the other response here. Trump is orders of magnitude worse. No other US leader in living memory has had such a negative effect overseas, and everyone I know in business in the UK is looking to move away from dealing with the US as quickly as possible given the unpredictable and capricious nature of the administration.
