Yeah, Carrick is the worst CB I've ever seen in my life. Pity he's a fecking midfielder, though.
I very rarely criticize the manager but I think he's cut his nose off to spite his face here. He's made a point by not picking Ferdinand and it's backfired, massively.
If he was really only resting Ferdinand, Carrick would have been whipped off immediately after the second goal, or at least moved into midfield and Ferdy replacing someone else. He hasn't done so, IMO because he left Ferdy out for personal reasons, rather than football reasons.