I try

(no Chinese keyboard available at this moment)

“直接的存在”存在吗？
Of course, by definition, all existence is direct. Why should something exist indirectly?

要真正理解God is love就是形而上
Agreed in some way. In my opinion, God is an intermediate existence between men and direct existence, therefore by the definition above, God does not need to exist. In fact, the Buddhist way doesn't need God.

凡人能做到Love your neighbor as yourself已经很好了。
Strongly agreed. This is why I don't like people talking big but empty.
This is also why Confucianism has worked relatively well and endured long in China because it is practical for common people like most of us.

一切用文字记录的，只能限于“平庸笼统”，
Not true. For example Daoist and Buddhist ideas are recorded in their due worth. Just read 道德經 and 金剛經 , I think they carry a obvious spisitual sublimity, definitely not 平庸. And Western philosophy, logics, math and physics can be recorded accurately, definitely not 笼统.

。“仁其實就是一種慈悲心。是對萬物敞開的柔輭和信任的心。”这就是你心里的“仁”，一百个人有一百个“仁”。
Ok. Here I am only speaking of the basics for one can not imagine 仁 without those qualities in my saying and vice versa.

作为形而上的认知系统，没有什么不足
Then why you think Chinese culture is so bad for it is some 认知系统  by your definition too?