ARSo, as a Chossid of a Rebbe and a Chossid in general, you should be careful about speaking דברי זלזול on a famous Gadol and Rebbe.
Yes, there are gripes and מילתי דתמיה but to personally be מזלזל is a big leap that you need to be wary of.
It is no doubt that many Rebbes, Mekubalim and great Talmidei Chachamim held him in very high regard. His Tefillos and Brachos bore fruit and his advice brought success. These are traditional metrics of gauging someone who is a cut above. His Bekius was attested to by Talmidei Chachamim who spoke to him, as well as written works.
I wanted to remain silent in this conversation but I’m not allowed to. Be carefull. You know the Gemara in Brachos 19a about what happens even if the Chochom doesn’t care.