There is nothing to dislike about Theresa May that was not also characteristic of Margaret Thatcher. Not a thing.
People who liked Thatcher liked a nanny to the nation, complete with the fact that there is not really anything behind a nanny if you are a grown-up. People who do not like May do not like a nanny to the nation.
Every reason for liking Thatcher, for being oddly frightened of a certain sort of middle-aged, middle-class Englishwoman that everyone else thinks is ridiculous, is precisely a reason for liking May. There is no logical ground for doing one but not the other.
So, if you dislike May, but you liked Thatcher, then what has changed in you in the intervening decades?