Earlier quoted context omitted.
The “progressive secular government” was a despotic dictatorship without a free press, where political opponents of Reza were assassinated, and rule was maintained through the military. The progress was progress for the wealthy. Yes, there was foreign interference before that; but it wasn’t better before that either.
The progressive secular government was the one under Mosaddegh. Though Reza was the Shah at the time, he did not have the tyrannical power until after the US backed coup, and that period is the pro-west regime I mention.
Mosaddegh led the nation for two years, half of which he had emergency dictatorial powers, which he used to forcibly reallocate wealth from landowners to tenants. And due to nationalizing oil, he faced a British boycott that caused the economy to fail (and declared the British an enemy... which was unwise). If anything, his short-lived leadership was one of the most rapid and catastrophic failures of leadership of any world nation in recent history. The US led coup was only planned 8 months after the emergency powers were granted to Mosaddegh. 5 months after that, the coup was executed.