Two reasons his players are playing better than you:
1) Gameshape management. He has more starters with 'strong' and 'proficient', where your three best gameshape guys are at 'strong' (one of those is a scrub). As people suggested, getting some other players to use in scrimmages is a good idea. Aim to get your starters 50-60 minutes per week.
2) He built up enthusiasm through the season by setting his game effort to "taking it easy". That higher enthusiasm gives his players a boost now when he uses the same effort setting relative to yours.