If you think Blink182 is all about simple power chords then maybe you should check out M&M's from their Cheshire Cat album. That song alone will totally kill that statement. And what punk or most rock bands don't use simple power chords. Almost every type of music be it pop, rock, punk, country and every variation of each, uses power chords.
And that's not all every song is. Or do you just not here the use of picking scales and such. It takes talent to write harmonies and stuff that sounds good together. And also, what's wrong with teen aignst anyway? If a large group of people can identify with your music and love it to death, then who cares what people like you think about their music.