Well, it's one of those things where the tough desicians to deal with far reaching problems are never popular. It's rare when politicians act to change anything, rather than fighting symptoms, and worrying about being popular enough to be re-elected. As I understand Thatcher's reign (in the US) she did a lot of things that were pretty bad in the short term, but have positive effects in the long term. She did them knowing this, and even saying so, but in the end people still remember her for the time frame where there was hardship and a huge unemployment rate, and not for the stronger economy that rose afterwards. It hasn't been all that long, and this huge unemployment rate isn't there anymore, and there is a highest average standard of living the region has ever seen. As far as The Falklands go, wars are NEVER popular, except maybe when victors record them in the history books, and people go "oh wow, that was awesome" (maybe) but nobody actually wants to be one of the guys living it, crawling on his belly through the mud, or sitting in a floating tin can, while trying to kill people and watching everyone die around them.
I think she's similar to "Dubbya" here in the US honestly. A leader who won't be remembered well until long after their death. Someone with many faults, but will probably be eventually acknowleged as having done generally the right things at the time, once people are seperated from the hardships by enough time. You might not "see" it that way now, but a generation or two after your gone I think perspectives on things going on now will be a bit differant, having the benefit of hindsight and not having to actually deal with the problems, or
hearing the opinions of those that did. People as a whole are not masochistic enough to feel their pain and suffering is for the best as they endure it, even if it is for the best.
Not a popular way of viewing things going by the responses I see here, but my thoughts.