他对这里的一切都很满意从不抱怨任何事（complain about)

楼上的朋友犯了点小错误，是complains about，不是complaints about [complaint是complain的名词形式。]，另外，用“so…that(如此……以致)”搭配较好。

He is so satisfied with everything here that he never complains about anything.

He is so satisfied with everything here and never complaints about anything.