There are many reasons why teenagers might reject their parents' solutions to their problems. For one, teens are often more impulsive than adults and may not be able to see the long-term consequences of their actions. Additionally, teens are still developing cognitively and emotionally, which can lead to them making poor decisions. They may also feel like they need to prove themselves and their independence, which can lead them to rejecting advice from authority figures. Finally, peer pressure can play a role in causing teens to make bad choices, even if those choices go against what their parents have advised them.