Any gadol who spoke out against chabad becomes a target of a smear campaign to say he’s a koton. So no need. to smear gedolim unnecessarily But they’re out there. So ask your mesorah why they’re against chabad.
For the record there’s chabad non-Lubavitch that you can get into, eg the mesorah of the Rogatchover , the Malach zt”l, or others. The Beis Haleivi married the daughter of a Lubavitcher, so obviously Litvaks held of Lubavitch early on.