You can also bring someone down to earth, but this is more of an idiom.

你也可以让某人脚踏实地，但这更像是一个成语。

We say: " Oh, you're bringing us down. Leave it alone. We're here to have a good time. Not to be too serious." So to bring people down or to bring someone down means to be depressing.

我们说：“哦，你让我们失望了。别管它了。我们来这里是为了玩得开心。不要太严肃。”所以让人们失望或让某人失望意味着令人沮丧。