There was an interesting set of articles posted on MoA on this subject. Although some of them are written from the 'liberal' perspective, nevertheless it has historical details which are worthwhile:

https://archive.is/YU4bw

https://openthemagazine.com/lounge/books/the-secret-memories-of-the-dalai-lamas-brother/

https://www.straight.com/article/dalai-lamas-links-to-cia-still-stir-debate

Although the feudal nature of the Tibetan society is touched on in these, Parenti doesn't take prisoners here:

2003 12 Parenti: Friendly Feudalism: The Tibet Myth
https://dissidentvoice.org/Articles9/Parenti_Tibet.htm

2021 Michael Parenti on Tibet and the Dalai Lama