Ofcourse you can have a different opinion. I said you were moaning because in all the previous versions of WE/PES the same thing happened. Nobody liked it in the beginning, but 2 months later it was the best game ever.
And no, I don't believe that you are playing on 6* because you obviously don't know how to shoot and head. Maybe you'd better start and play on 1* to learn the game mate. I've scored a good number of far distance shots and headers on 4*, so it is possible on 6*, but you are just not capable of doing that. You say the computer can't score because they can't shoot or head. So from hearing that, the CPU does get chances from you. I play 4* and when the computer gets a change to shoot he'll shoot, and sometimes the misses and sometimes they deliver a fantastic shot. Same goes for the headers, the CPU doesn't get to many chances to hit from me, but when they do, they sure know how to head. And you are telling me the CPU on 6* doesn't know how to shoot or head....
I've played almost all the ISS/PES/WE games in the series so I do know my game. I also know that with every single new game in one of those series there is some time needed to get used to the new game. Believe me, I master PES3 and it's prequels.