Yeah, Lubavitchers are more likely to be OK with a non-Chabad mikveh than the other way around, so it’s not really a good path to go down to try to say they’re judgmental in this area. The point was brought up on another thread, but the context was different.
Bratzki, the “finding 10 examples of the opposite” is flawed logic that we’ve discussed on other threads. Stuff like “sure we insulted another big rabbi, but we fed 10 fried out Yidden this weekend, so it evens out.” That isn’t how it works.