The article you linked is about Trump, not Argentina. I assume you meant to link this one:
https://thehill.com/opinion/5101981-argentina-economic-crisis-javier-milei/
You are confusing year-over-year inflation with month-over-month inflation. According to the article and its source, year-over-year inflation was at "160 percent" "in his first year." If you look at what was actually being measured, it was inflation
when he took office in December 2023. That's bordering on a bald-faced lie from the author, because that figure measures the Consumer Price Index (CPI) in 12/2023 compared to 12/2022, but Milei was only president for a couple of weeks of that time period.
Similarly, the 25% month-over-month inflation was an outlier, and here at least the author is honest enough to clarify that the most recent month-over-month figure is under 3%.
That's to be expected when the poverty rate was already near 50% and increasing when he took office. He could have done absolutely nothing and it would still be over 50%.
If you read the article your opinion piece
linked for this claim, you'd see the exchange rate had been manipulated by the socialist government since 2019 to keep the peso artificially strong. The current "devalued" rate is probably where the currency should actually be and is generally seen as a good economic move.
Pot, meet kettle.