The problem is, a lot of so-called conservatives aren't practising conservatism at all. This is very clear in the case of e.g. Trump, and Australia's Scott Morrison. An actual conservative would find the 'policies' of these people very scary indeed.
However, I don't really get why people don't like Boris Johnson. He seems OK to me, especially compared to people like Trump, Morrison, Obran, Bolsonaro etc.