I don" t like the way he speaks to his staff membersI don" t like (the way) he speaks to his staff members为什么不可以用the way that ,the way which,the way of which

I don" t like the way he speaks to his staff members
I don" t like (the way) he speaks to his staff members
为什么不可以用the way that ,the way which,the way of which

这句话完整形式是the way that,是有that,只是这里的that可以省略,为了句子的简练就省略掉了,是个同位语从句.
也可以改成I don" t like that he speaks to his staff members.但这样就成了定语从句.

the way that固定搭配，that也可以省略