The entire team has been crappy the last two games, and your reaction to that is to bash Semih? C'mon, be fair.
If you had posted this after say, the first OKC game (the one we won, where he played well), then I'd say, okay - that's how you feel.
Keep things in perspective. When (if?) we're injury free, he's the 5th big, and he's only off the bench in garbage time, or to take a few hits. So far, in the majority of his games he's been quite good. Based on that fact, and adding to that, that he's probably going to take a few months, perhaps even a year, in order to fit in properly, and learn the language, I think it's a pretty good situation.
He's looking a bit clumsy out there, but what rookie doesn't? I can't recall many, especially not any 60th pick rookies!