As far as I can tell a pseudoreligion is a religion that hasn’t coalesced as of yet into a distinct set of shared beliefs. That is how I would use the term.
However, this contradicts many of the ways that it is used generally, which seem to match your view of how people use the term. I am therefore not sure that it is helpful term given the common usage and connotations to that usage. Cult is similarly a difficult word, it is useful in a technical sense to define the worship of something but commonly has a very different meaning.
As far as I can tell a pseudoreligion is a religion that hasn’t coalesced as of yet into a distinct set of shared beliefs. That is how I would use the term.
However, this contradicts many of the ways that it is used generally, which seem to match your view of how people use the term. I am therefore not sure that it is helpful term given the common usage and connotations to that usage. Cult is similarly a difficult word, it is useful in a technical sense to define the worship of something but commonly has a very different meaning.