Why Do Some British People Not Like Donald Trump?

There are reasons:

Trump lacks certain qualities which the British traditionally esteem.

For instance, he has no class, no charm, no coolness, no credibility, no compassion, no wit, no warmth, no wisdom, no subtlety, no sensitivity, no self-awareness, no humility, no honour and no grace – all qualities, funnily enough, with which his predecessor Mr. Obama was generously blessed.
So for us, the stark contrast does rather throw Trump’s limitations into embarrassingly sharp relief.

Plus, we like a laugh. And while Trump may be laughable, he has never once said anything wry, witty or even faintly amusing – not once, ever.