The problem is Carroll is not being played to his strengths.
While not the most skillfull player in the world he is a big bustling centre forward who should be playing FACING the goal and running onto crosses from Downing and other wingers. Doing that he would strike fear into most defenders.
But Liverpool are playing him with his BACK to goal, alongside Suarez, and trying to make him play like Suarez, laying balls off and running into spaces.
I saw Liverpool at Fulham earlier in the season and Carroll and Suarez were playing in a 4-3-3 formation, with 3 up front.
Suarez and Carroll were switching positions with Suarez sometimes going into the middle and Carroll going out on the wing. As balls were played up to Carroll on the wing with his back to goal he was trying to lay them off and he looked awful.
Put him in the middle as a cenrtre forward, let him FACE the goal and run on to crosses, and you may get the best out of him.
Keep trying to make him another Suarez or Dalgliesh and you are never going to get the best out of him.
p.s. Having said that he was never worth 35 million in the first place. Liverpool just panicked when Chelsea offered 50 million for Torres.