With regard to mental health and how to deal with dysfunction, to survive, to get along in situations that cannot be escaped/e.g., when around toxic players, specifically, highly narcisstic people:
I am pleased I found Dr. Ramani's videos on YouTube. Two thumbs up to her for sharing her knowledge. So therapeutic. One that really explains grey rock method well -- I am going to share. Quite good and the method is thoughtfully and well explained:
https://youtu.be/AmksB-SIvtA