I think the point Stroller was actually making is that he hated Margaret Thatcher and she's a convenient hook to hang any subsequent failures upon - not least that she can't fight back any more.
Nobody on the left remembers the state of the world when she became Tory leader, then PM in '79. I remember being very worried, even as a child, about the ongoing Cold War, and grew up with the Berlin Wall, the nuclear arms race, and the destruction of Britain's manufacturing industry by the Unions. There were challenges to Britain all over the place, not least in the South Atlantic.
In '91 when she left office, all of these things had, to a lesser or greater degree, been resolved.
I appreciate that some areas of industry were badly treated, however her legacy for me is mostly positive and she was PM during some major changes in my life - leaving school, getting into work, buying my first home, getting married - so it's not a time I look back on with much animosity.
The left do not see that time positively. They focus on mine closures, rioting, milk, etc and prefer to abdicate responsibility for their failure in Government in favour of perpetuating the utterly obsolete and irrelevant 'class divide'.
I am not 100% an admirer of Thatcher, however, there's no doubt that Britain was a better place after her tenure than it was before.