To be fair, when you're at that age and come into contact with dozens of "adults" that never mentally grew past 12, you're bound to think you're "very smart".

Yea except I know I know everything so I'm built different

There’s a reason second-year students are called sophomores. It’s a compound with the same roots as “sophisticated” and “moron”. It literally means “learned idiot”. It’s referring to the students who have a year of schooling under their belt, and think that they understand everything about the world. It’s basically referring to the Dunning-Krueger Effect, where people who know very little about something are the most likely to overestimate their knowledge on the topic.

You don’t get any smarter, just wise enough to know how dumb you are.

If you're lucky