If you want an example of the burnout side of things look up the end of Francoist Spain and how it transitioned into modern Spain. It's a whole mess but kinda interesting for how fascism just kinda runs out of steam and burns out after awhile, though it should be noted that Spain basically moderated at least partly because Francoist fascism was relatively utilitarian so when the project collapsed there was enough salvageable structure to just kinda moderate.

Either read Marx and apply your analysis from there, or read The Doctrine of Fascism and use that as your definition of fascism. All of UnderpantsWeevils claims about fascism have no basis except just going off vibes