it's scientifically proven that people mentally mature as they get older
As somebody who's had to put up with your shenanigans for more than a couple years, I can safely say age doesn't always correlate with maturity. In your case, it's petty insults, bigotry, bullying, authority issues and a childish, selfish disposition that make me think otherwise.
My little cousins know how to behave better than you do, and they're younger than ChappersTeddy. What does that have to say?