In answer to the original question, I think it must be the case that Maggie is a hate victim because, unlike politicians either side of her, she actually did things. Massive changes from 1979 to 1990, in the balance of power between the workers and Parliament, in denationalising just about everything, in the balance of the economy, in World affairs, in energy policy, in goodness knows what else.
Few politicians of the last 40 years or so can claim to have changed as much. Maybe Attlee's introduction of the modern Welfare state and the NHS, or the changes in "moral law" of the late 60s when abortion, homosexuality and the like were decriminalised. But for sheer weight of change Thatcher seems to win hands down. For better or worse she certainly got a lot done. And getting things done means upsetting a lot of people.
Incidentally, no I don't idolise her.