Complex sentence: He is a spoiled brat who has always lived life like a king, but deep down he is a rebel, and doesn't want to follow the same routine as most of his elder brothers or family norms would want him to.
Split into simpler sentences: He is a spoiled Brat who has always lived life like a king. But deep down beneath he is a rebel, he doesn't want to follow the same routine as most of his elder brothers or family norms would want him to.