I blame television + social media favoring stupid, anger inducing soundbites over well thought out rhetoric.
And Duverger's law [0] leading to a duopoly of two political parties who spend all their time bickering and scheming to get more power because they've decided politics is a football game where the goal is to score more than the other team and not a civic duty to run the country for the benefit of the people.
You pay peanuts, you get monkeys.