I can't imagine the other choice could be worse

It probably depends on what you want to achieve. At the moment it's probably to avoid hyperinflation, another national bankruptcy and poverty levels climbing to new all-time highs. Massa (the other guy) is known for trying to counter the effects of the current massive inflation by printing more money for government subsidies (let that sink in for a moment), so one could argue that whatever Milei actually does, it can't be worse than that.

His (to put it mildly) over-the-top rhetoric, homophobia/misogyny and the suggestions to sell your organs to make ends meet etc. are different beasts altogether, but I can't blame the voters for ranking having food on the table higher than strengthening LGBTQ+ rights. I'm grateful I don't have to make that choice in my own country.