qwerty, here is what R’ Belsky zt”l said about Chabad:
“Chabad used to be about disseminating Chassidic teachings which the Baal HaTanya wrote, saying his Divrei Torah, etc. In America, Chabad started out with Shlichim going out and bringing the masses back to Judaism. These are goals which we share and do not contest.
But present-day Chabad has nothing to do with the above. Present-day Chabad has become a personal cult centered on the previous Lubavitcher Rebbe. Everything they do from beginning to end, revolves around this. They constantly project his image, talk about him and how great he was, how smart he was, how he was a better strategist than all the generals, that he was Mashiach. etc. This is the way people talk about a cult figure. There’s no room in Yiddeshkeit for a personality cult in which an individual is deified and glorified. Whether he was great or wasn’t great is immaterial. There have been many great people in Judaism. The personality cult of glorifying an individual person, giving him unique titles, elevating the shape other building he was active in. etc., has no place in Yiddishkeit.”