Well I cant really say what "anatomy" problems there are with this, because I don't know if its supposed to be a human, or some sort of creature. His legs are uneven in size, same with his arms, it doesn't appear he has any elbows, he isn't center to the throne and his torso is rather giant compared to his legs. The way his legs are bent, it gives no depth of perspective from his thighs, so it just looks like he is standing with small legs while holding the sides of the throne. The bottom of the thighs should stop at the same height as the throne seat, and the legs should bend down from there. I am not exactly sure what kind of pose you were going for either.