I actually watched the game, and he didn't suck at all. On NU.nl there's a report with comments from the coach of GS, and he said that he was disappointed with Drogba and Sneijder's performances. He just neglected to mention that he played them both horribly out of their positions.
Despite that I've still seen Wes making four great runs with some very smart passes within the first twenty mins alone. The players who received those passes, however, immediately fucked them up; they were clueless beyond belief as the team is made of loose sand instead of being built around Sneijder. Continueing making such runs and passes would be a waste of energy, so he slowed down. Coach replaced them both in the second half and then Gala played even worse. This is just another case like we had here: play Wes out of position, in a team full of shitty clueless players with no game plan, and yes he will look useless. Unless you go look at the stats and compare them to the rest of the team...
This horrible coach is the reason behind Gala's failure. He didn't build a team around Sneijder and upon that even thinks a guy who hasn't played an official match for almost half a year should suddenly play like a god. It just doesn't work like that, and now that he has found out the hard way he decides to hide behind these two famous players now that he has them and blames them for it, instead of defending them.
Sneijder and Drogba did good under the circumstances. Better than anyone else in their team. Deciding to join that team was just a bad decision... unless that coach gets sacked and we'll see.