The rules seem very relaxed at these racedays! The DC5 made several left/right manouvres not to let him past which, if the guy behind is blatently coming alongside you, you shouldnt be allowed to slam into his offside front wheel like he does. Even BTCC drivers cant get away with that.
If you look at the DC5's driving line, he barely hits one apex...poor basic race driving skills there. And signalling to him out the window? Lucky he didnt have it ripped off on a later corner when they came together.
Civic driver = good
DC5 driver = Amateur, all speed and no control