Seconding Etymotic. And if you wanted to upgrade later, you can get custom ear molds from an audiologist and use those instead of the included foam or rubber tips. It’s among the best sound isolation you can get. I’ve also always had excellent experiences with their customer service.
The term narcissist is somewhat overused, though there are also a lot of them these days. To echo a bit of what others said, thinking average high schoolers are dumb is not a sign of narcissism. Average high schoolers are notoriously foolish. Even if you feel like it’s more than that and it’s a serious problem, that alone does not make a narcissist.
Actual narcissists are unstable. They need the adoration of others to feel good about themselves. They’re prone to fits of rage when anything damages their ego, and they can take just about anything as criticism then decide to fly off the handle.
If that is you, get help from a professional who specializes in it. If anyone reading this knows a person like that, read up and find a way to save yourself.