The socialist policies were ruining the country so much that taking any other course of action would be suicide. He's actually doing a great job in restoring sanity but unfortunately that takes time.

In this case it's the currency controls which artificially makes the peso more valuable against the dollar. It's an awful way to hide how badly you are actually doing. But apparently it was politically impossible for him to deal with it until now. His mistake was of course not doing so earlier.

He is an odd fellow for sure but labeling him as a delusional libertarian is very unfair.