qwerty > Yes the Rebbe was a gaon in Torah, but he rejected open Gemaras that didn’t jibe with his agenda.
L Rebbe tried to address important issues of his generation, some of these new issues that did not exist before and with innovations that did not exist before. It is always easy to criticize those who try to do something. Those who disregarded Jews who were assimilating; Israelis; Russians behind Iron Curtain did not do controversial things, so nothing to criticize for.