Its the swearing and the aggression of Yamiks which put me right off and makes his videos for me hard to watch. Not compatible really with playing the videos while i'm working.
As regards if streamers are abandoning Elite, frankly, I don't normally care. They come and go all the time. The only one I do miss is Mercenary Thornn, he used to be a very good watch playing a good selection of games.
Personally I grew up in a hood where everyone spoke like Yamiks, so I see straight through that and focus on the message. When I started playing ED, the first youtuber I found was Astro/D2EA. He helped me a LOT getting into the game, which honestly has a learning curve similar to some of the complicated astronomical software I've used. Astro is a very nice guy
Then I stumbled upon Yamiks, and that taught me some of the less official sides of the game. On top of that he made me laugh, and lack of humor is one of the issues I have with ED. Some of his videos of places to visit etc. are very informative, and his recent long review of Elite shows both his love towards the game, but also that because we love the game we want FDev to continue delivering what we love, instead of adding a half baked FPS. Yamiks is even an avid FPS fan.