Sark went from coaching QBs at El Camino College to head coach at Washington in 9 years. He was 33 when he took that job. That's a meteoric rise to become a Division 1 coach. They went from going 0-12 the year before he took over to 10 wins the year he left. That's a good job for a team that has never been a blueblood.
USC was a shit show, but he was fired in the middle of his second season because of his drinking, and he's done every reasonable thing a person can do to rehabilitate himself from that. His track record as a head coach is at best incomplete.
I don't know whether he can build a dynasty, but he's a helluva lot better than that asshole we hired from U of H, his offense is miles ahead, and his coaches are much better recruiters. I don't know what your profession is, but I don't know that I'd want to work for you with a take like that based on the fact that he couldn't turn Washington into Alabama in 5 years after Whittington ran it into the ground.