Dear Avram,
You ask about why Chabad does not give Torah sources. First of all, it’s pretty much laid in Tanya and other classics. If you think they are learning it wrong, than more sources won’t help. Second, look at this thread. Who is coming to this argument to learn up Chabad? Third, asking Chabad for a response of what some of Chabad thinks, is beyond sources. You have to sit people down, and ask them very specific questions.
And do get to the superiority claim, the people that have issues with Chabad, even the gedolim, just don’t speak in the same terms as Chabad. So it makes specific questions impossible. And then Chabad says, “you just don’t understand. We know better.”
It’s not a bias as much as a language barrier.