MS, you’ve got it backwards. The reason people “mock” Chabad is because some of their haskafos and hanhagos are outside of the pale.
Sukkah is perhaps the most concrete example because of its clear twisting of halacha. Until you understand that there is a qualitative difference between some of the differences we have with Chabad, vs. the differences we may have with some others, you will continue to believe that we are finding excuses to put down Chabad, rather than the truth, that the reason we don’t like Chabad* is because of these things we strongly disagree with.
*I just want to make abundantly clear that there is, in my opinion, a lot to like about Chabad, and there are some Chabad chassidim I know for whom I have a lot of respect and admiration. I still firmly reject some of the tenets espoused by and associated with Chabad.