Well, there is still a possibility.
Here is a story. Back in 1996 pro-western president Boris Yeltsin entered his second term presidential election race with 8% approval rating and ultimately won the elections.
What happened after that is described in details
here, but basically enormous foreign contributions to his election campaign, securing more debts from IMF, selling out state property in exchange for support, best image-makers in the world were running his advertising - everything up to the outright electoral fraud.
Also, Yeltsin suffered a serious heart attack in the middle of the elections and it was concealed from the public.
Macri's situation with his 32% rating is incomparably better.