I agree the match is very easy. The problem I have is The Rock doesn't seem to ever want to do his Rock Bottom for me to counter. I will sit there and wait and all he will do is punch or if he grapples and I counter it he still hits me with a samoan drop.
All the rest of the objectives are cake. He just will not do his finisher. I spent 30 minutes with him on level 3 and the only thing I did was refill to level 2 so I can heal myself occasionally. 30 minutes and not one Rock Bottom. Objectives are fine but ones requiring the simple minded AI to do a single move so you can continue is a bit much for me.