How do you know you're not in a cult? You seem very convinced that everybody else is.
I don't believe that at all. And as for myself, I'm not a member of any groups or organizations whatsoever, let alone cults.
So how do you define "cult"? Must they always be of a religious nature? QAnon is clearly a cult to you even though it has no formal set of moral rules or any underlying philosophy concerning God or otherwise. Is the Boy Scouts a cult? Political parties? Fraternities?
How about small religions in the West which may or may not involve a deity but are of a religious nature nonetheless, i.e. Buddhism and Daoism?
I'm having an interesting discussion with Mopolis on this subject in another thread. Essentially, a cult is any group of people brought together by the veneration of a particular person, object, or idea at the expense of all others. In the pejorative sense, it is typically characterized as insular, small, and not socially acceptable.