Trump and Bojo have significant similarities. They are both narcissistic, have a complete disregard for the truth (it's not just that they lie - they really don't care if what they say is true or not), care nothing for their country or the people in it, view themselves as above the law, reward loyalty richly and punish (perceived) disloyalty harshly, and surround themselves with sycophants. They both consider themselves to be experts in all they do, and to know better than the /real/ experts. Both are evil bullies. Trump has a carefully managed hairdo designed to look like a dead squirrel lives on his head. Bojo has a carefully managed hairdo that would embarrass any self-respecting scarecrow. I could go on.
But there are also differences - Bojo is actually quite intelligent, while Trump is a complete moron.
You managed to get rid of Trump (though not his memory, legacy or groupies), the UK has still got Bojo. And Trump was more of a one-man catastrophe, while many of the UK's current problems stretch much further back - Brexit in particular was not of Bojo's creation. The Brexit referendum was before he was prime minister, and he was originally against it, until he figured out that he could gain political power by supporting it. (That's not to say that the USA does not also suffer from long-term social and political problems with roots far deeper than just the last presidency or two. If we try to dig up all the major troubles the USA and the UK have, we'll be here all day!)
Overall, I don't think Trump would make the UK situation much worse - but he would not be capable of helping it either. Anyway, we have enough of his lying, cheating, tax-dodging and environmentally damaging golf courses already.