Aside from not understanding how market economies work (from the 1930s to the '50s, an awful gap, to be sure), Franco and Salazar did nothing wrong.

Well, that's not true. According to Anthony Beevor, the Spanish anarchists would enter a city and slaughter "enemies of the people" en masse. The Communists would enter a city and immediately suborn it to the Staliinst COMINTERN. The Nationalists did this:

When Major Castejón’s ‘Column of Death’ reached Zafra on the road to Badajoz, he ordered the local authorities to provide him with a list of 60 people to be shot. ‘Little by little, those on the list were locked up in a room of the town hall. Some inhabitants who came into the mayor’s office were shown the growing list. They were allowed to remove three names providing they wrote down three others.’ In the end, 48 of the names were substitutes.

WHAT. THE. HELL?

It is stupidity like this, these unforced errors, that has been slowly killing the Right.