Question about the book No Man Has Control Over the Spirit

In honor of Rabbi Shalom
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The Rabbi determined that in faith the Sages have no authority over us, not even formal authority, and for two reasons, A. did not receive from Sinai, and this is only the fruit of their imagination/period. B. there is no commandment on beliefs and Tza A. May we not hate the Talmudic law, which has formal authority, since we have accepted upon ourselves, and why did we not say that we did not receive from Sinai [I am talking about things that are not received], and this is only the fruit of their imagination. B. Just as there is no commandment on beliefs, there is no commandment on laws that are not accepted [I believe that there are such [of course A comes after B]]
thanks