How does any of this matter when Trump won the popular vote? You can’t get around the fact that more than 50% of voters voted for Trump.
I totally agree that your political system is fucked, but let’s not fool ourselves into thinking that Trump won because he cheated the system or the election was rigged. Trump won because he convinced people to vote on him, and that’s the real problem.
Reputation, word of mouth, history, etc. Same way you decide anything else you consume.
How do you pick where you go shopping? You pick the closest one. Then if it turns out to be bad, you go elsewhere.