You might consider reading "Cultish" by Amanda Montell:
https://www.amazon.com/Cultish-Language-Fanaticism-Amanda-Montell/dp/0062993151
This book documents the type of abuse of language that you've experienced by way of Rationalism. From my layman's perspective, Rationalism is well on the road to developing the sort of thought-terminating cliches and overloaded language that allows cults to close off members from any external influence.
There is a great book by Amanda Montell about this that recently came out. Highly recommended!
Read the A.Montell book Cultish: The Language of Fanaticism it's exactly what you're talking about - how soundbytes and meme words basically brainwash people or at least are used to control a narrative or politics and reasoning.
It's scary shit.
Show Notes :-
Amanda Montell is an author, linguist, and podcaster with a new book 'Cultish' on "how cultish groups from Jonestown and Scientology to SoulCycle and social media gurus use language" to manipulate followers and cultivate power.
In the interview she offers fantastic insights that cover not only guru linguistics but also the social dynamics of modern cults and 'cultish' phenomenon.
We learnt a lot from Amanda and hope you will too!
Links
I haven't been part of a cult - but I just wanted to drop a book rec - Cultish: The Language of Fanaticism by Amanda Montell was a really good read.
https://www.amazon.com/Cultish-Language-Fanaticism-Amanda-Montell/dp/0062993151/ref=nodl_
If you haven’t read this I highly recommend it. And yes, she does include MLMs.