I learned TM as a kid, taught to me my a friend of my mom who lived with us for a few weeks after she returned from India, she had studied with Maharishi (or the ashram anyway). This meditation works well enough for most, it is a quick and dirty technique Maharishi, a low caste accountant, lifted from an Ashram he was working for and repackaged for people who could pay.
The German 'raja' *guy is bonkers (and a narcissist) however the TM organisation is as near to perfection of what we consider a shadowy corrupt cult as you can get. I did a film production course for a year and Lynch is one of the masters of the art however.. the people he associates with, their love of lavish lifestyles and fleets of Rolls Royces...
David Lynch has extraordinarily poor judgement for a apparently smart guy. Trump has his cult following as Maharishi did. I may have a copy of the full movie in English somewhere. Also worth a watch.
* Every country (rich, TM org likes money) is has a 'raja' head that oversees the TM org's goals.