Honestly, if shuttering the central bank and dollarizing the economy were his only plans I'd actually think it sounds reasonable. I'm pretty leftist but Argentina has pretty well proven they'd be better-off without managing their own currency.
The problem is that the man is absolutely batcrap in every way imaginable. He's climate-change-denying, hateful, constantly insults and threatens progressives with ludicrous insults like "libtards", considers sex-ed to be "brainwashing", etc. It's like if a country had elected Tucker Carlson for president.