What will u do if u found out that your husband went to batam secretly but when confront he says he wanted piece of mind as I as a wife couldn't give him happiness.

You need to talk to him. Whether what he did or did not or whatever, please put it aside. What sort of happiness is he looking into? And why is he not happy? Why does he feel you are the one not making him happy? I think sounds serious. Sometimes it might be because he is stress at other stuffs. And just lashing out