Pilots are taught that pilot monitoring should speak up if something seems wrong, and take over the controls if the pilot flying does not respond adequately, even if the pilot flying is a senior captain. However, do they actually train such situations?
For example recently a final report for accident of US-Bangla Airlines flight 211 was published. The accident involved a badly disoriented captain trying to salvage a really botched approach, and while the rookie copilot did try to be helpful, neither she nor the tower controller was assertive enough to explicitly call go-around.
I would think that some practical training would help in this kind of simulation. I am thinking of a simulator session that would start with the instructor being pilot flying, doing something wrong and acting confused and expecting the trainee to intervene appropriately. The trainee would know the instructor expects them to intervene, and thus wouldn't have qualms about it, but the trained reaction would still help overcome interpersonal issues in real flight.