She won three elections in a row - a record unprecedented in modern times. (In the 18th Century the King and Lords appointed PMs.) She must have been pretty popular.
Any politician who doesn't make any enemies would have to be pretty ineffectual.
John Major probably hasn't got many enemies. Everyone said he was a very nice guy. When he was PM, the leader of the opposition said that John Major would mow your lawn for you,when you went on holiday, if he was your next door neighbour. There won't be any protesters when Sir John dies. Because he didn't really do anything.