Marty turned San Diego into a Super-Bowl caliber team. He was fired because the owner of the Chargers is a nut-job (he considered Marty's style of play "out-dated"). When Marty was in charge the Chargers went 14-2 last year, and were playoff contenders for his last two. Now, the Chargers have a rats-ass chance in hell to even make it to round 1 of the playoffs. Marty, given three-four years, could take any team to the Super-Bowl and win.
Don't be so hard on yourself. The Ravens still have one of the best Defenses in the league. All you guys need is a quarter-back worth a damn. McNair could run back in the day, but he's never had a good arm.