“Here, what we believe in is: You either get better or you get worse. You never stay the same.” Sean McVay, the 31-year-old coach of the Los Angeles Rams, the youngest head coach in modern NFL history, is standing outside the offices of the team’s training complex in Thousand Oaks, California. He speaks with the conviction of a man who cannot, will not, stomach complacency. And he isn’t just talking about his players; he’s talking about himself.