what did she do? i dont follow other countries politics (unless its literally thrown in my face every time a president does something stupid like what's happening in the US)
Fucked up unions, fucked up the workers, fucked up villages, fucked up the Queer community, war crimes, tax breaks for the rich, privatised core infrastructure, tried to fuck up the EU...
It's multifaceted, but I can mention one of the things she messed up: She made council houses a commodity^[1], and now everyone is paying the price because nobody can afford to buy their own home because said council houses have been taken over by greedy landlords that keep the rent so high that nobody can afford to save up for a house of their own.
What she did was the equivalent of pissing in your trousers to keep warm..
Council houses used to be the affordable stepping stone before you saved enough money for your own place.
It would be easier to list the things she didn’t do.
Long and short, screwed over a lot of minorities, oversaw a lot of violent conflicts, and reshaped the UK economy and government to benefit the financial sector and ultra wealthy at the expense of everyone else.
You get different answers depending on who you ask. Of course, those on the left despise her for good reasons, which others have already mentioned.
Then on the one hand, there is argument to be made that her deregulation did save UK from bankruptcy at the time of financial turmoil catalysed by the 1970s oil crisis. The deregulation, of course, made her a darling among the right because it also made businesses more flexible.
Another bit to note is that, whether you are left or right, it is undeniable she handled the Falklands War impressively. That is commendable regardless of one's political leaning.
She was a pretty hated British Prime Minister during the 1980s. When she died in 2013, people celebrated with the music "Ding dong, the witch is dead!" - Here's one such video https://www.youtube.com/watch?v=9hvccEpOFhc
They vote against their interests but not against their emotions. People hate her now, for good reason. The people voting for her then, clearly didn’t hate her.
I don't know how UK elections for prime minister work, but experience and history have shown me that people can be fucking stupid and elect the worst option available, no matter the country.
Also, due to the power of wealth and mass media ownership, the most famous candidates (and therefore the only ones with a realistic chance of election) are consistently garbage.