The “manipulation” is normal bookmaking. Adjust the odds to entice gamblers to wager their money so the losers of a wager payout the winners of a wager and the bookmakers make money on the spread. So if there is a few big bets for Trump, Polymarket will readjust the odds to balance the equation.
Teaching critical thinking skills it not a solution. People are not getting fooled, they want to believe it, it fills an emotional need.
Neo-liberal solutions to societal issues focusing on individuals has been a complete disaster. It is basically victim blaming and doesn’t actually scale in many circumstances.
Eg. High house prices; Victims fault for not working harder and saving more. Neo-liberal solution: Work longer, spend way less. Outcome at scale: Economy crashes due to low spending.