To give three things off the top of my head that might make modern Cons sour on her: She accepted the science on climate change, wanted the UK in the EU, and ceased arms sales to Israel in 1982 due to the invasion of Lebanon.
She’s not culture wars enough for them, even if she was economically ruinous, just as they desire.
What they really want is a Thatcher Mechagodzilla who spouts all the culture wars lines they want, has huge stomping feet that kill poor people, and fires detransitioning lasers from its eyes. It can also be AI powered and take away the need for any thinking or education at all.