Criticism is fine, nobody has to be happy with the decisions Facebook makes, and are welcome to loudly and aggressively voice their opinions.

Suggesting legal measures against Facebook, "perhaps we need not only a separation of church and state, but also of tech and state", is entirely different and completely unwarranted on the basis of them "regulating (or interfering with) speech" as seen in the submission.

I'm not a user of Gab and unfamiliar with their apps, but I assume it can be accessed through a standard web browser (Safari, Google Chrome).