It turns out that the people will vote for some terrible things in order to get that one petty little thing a given candidate promises and they want, or because they don't like something specific about the other candidate(s). And of course many may later say “well, I didn't vote for that” when they quite demonstrably did.
The measure is the number of votes. "What shall we have for dinner" measures things, there's no target in a "curry vs pizza vs thai" poll, and it doesn't really matter, the target is a nice night in with a film.
However with politics, getting power is the goal, thus the number of votes is thus the target, and thus its not good at measuring what the country actually wants, just who can best get the most votes.
This isn't new, but modern brainwashing allows manipulation at a scale hitherto unseen.
The problem is that people put stock in pre-election promises, rather than voting for the character of the person they want to represent them.