She would have been horrified to be considered a feminist, let alone an icon.
She got where she did without any special measures, tokenism, just determination in a man's world.
I was an adult in the 70s. I was from humble origins with Labour voting parents and voted Labour myself but I was horrified at what was happening to this country. The old heavy manufacturing/mining industries were doing a pretty good job at destroying themselves well before Thatcher. They were inefficient, unproductive and dominated by Communist led Unions who were holding the country to ransom --"Everybody out" was the catchphrase of the decade. They were only kept going by huge public subsidies which we no longer had.
We were indeed the Greece of the 70s going cap in hand to the IMF while Callaghan froliced in the Seychelles -- "Crisis, what crisis"/Winter of Discontent etc. I was working in Germany for a while and we were truly "the sick man of Europe" and a laughing stock. Our German friends had a catchphrase "British Leyland" which they attributed to everything that was shoddy.
So it was a breath of fresh air to have someone in power who stuck to her principles and not sway with every opinion poll. She was determined that these Communist led unions should no longer bring the country to a halt, causing three day weeks and the lights to go out (we were even running out of candles!). Heartbreaking though it is to see these old industries and their communities die, they were well on the way to dying well before Thatcher.
No leader trying to revive an economy is going to deliberately destroy any industry that is actually productive.
A lot can be learned by how how other countries perceive us and I personally saw the change and the growth in admiration and respect that was felt for this country and Thatcher in particular. As such she was an inspiration for women all over the world.