>Nobody would vote for a politician who just makes things worse
Why not? One thing is the campaign, another one is exercising his power. To quote a famous Argentinian President: "If I said what I would do, they wouldn't have voted for me".
I can't find the source of that quote (possibly a misquote?), but if I had to guess, he's saying he sold people on the problem, knowing they wouldn't like the solution. Everyone likes the idea of fixing the budget deficit, and some people like the idea of cutting wasteful government spending, but the act of fixing the budget means people lose jobs, and lives are destroyed. Even though it has to happen, people don't like watching it happen.
I don't think your "quote" says what you think it says.
I think they were thinking of Carlos Menem's "si hubiera dicho lo que iba a hacer, no me votaba nadie” , but AFAIK thats a misquote [1]
A more recent Argentinian president (Mauricio Macri) said a similar thing though: " If I had told them everything I was going to do, they would have voted to lock me up in an asylum" (Tl mine).
Original [2]: "Si les decía todo lo que iba a hacer, votaban por encerrarme en el manicomio"
[1]: https://www.infobae.com/sociedad/2023/11/12/si-decia-lo-que-...
[2] https://www.cronista.com/economia-politica/Macri-Si-les-deci...