It's a pressure cooker for drivers and C. Horner seems to extract sadistic glee in fucking with these young drivers they throw up against Max.
Max was obviously molded by his father to resist psychological pressure. That combined with the fact he may be the best driver in the world insulate him from the toxicity. But between Webber, Albon, Kvyat, and Gasly, RBR has treated them horribly then glibly said "well it's F1 mate you have to stand the pressure to survive." It's sick.