One major problem is that the three 'Billy-Big-B0ll0cks' (Rooney, Gerrard, Lampard) don't want to be team players. They're basically selfish ball-chasers who won't hold down a position and do the job they're allocated. Ironically, the only one who tries to fill the role he's been given is Heskey - he's just crap at it. But he's there because of Rooney's selfish reasons. He in particular knows Clip-Clop will try and feed him and give him goals, whereas Crouch will try to (and often does) score for himself. Clip-Clop had a clear opportunity to shoot shortly before being subbed (just after trying a poorly-executed step-over), but chose to cross instead - behind the incoming players.
Felt sorry for Barry being subbed as he at least tried to play his position.