If a random person in the street said that the world will know that rav moshe feinstein runs the world, you would disregard him as a lunatic.
Why is it different when a chabad rabbi claims this for his rebbe? Why do we run to defend it? Just because chabad does chessed and kiruv doesn’t mean they’re immune to criticism.
People will say “let’s see what you do next time you’re in Oklahoma and the only place you have is chabad”.
The above applies; that does not make one immune from criticism. For the record, I also was told by my rav to daven beyechidus rather than in a chabad shul, in light of the possibility of rebbe worship therein. I also wouldn’t eat meat from them.