>How is trying something else sure to lead to the same?

Because that's kind of how Latin America has worked for decades. Pivot from shock therapy Chigago school free marketeer to the other end of the spectrum and back again, usually because leaders are either eccentric, strongmen or plain crazy and radical reforms start to cause social upheaval.

What would be an actual change would be just putting a competent, moderate administrator in charge.

You have a bad headache. Try trepanning! You never know!

Decades of Peronism a headache? Analogies only go so far.