I'm sorry but I don't share your sentiment here. You were asked a fair bit about difficult personalities. That is you were warned as much as HR could warn you. And then you jump into the role totally oblivious to that aspect and you go about focusing only on engineering. I mean, and it's typical for engineers, there are _always_ way more moving parts in businesses than machines. But you always focus there and take pride of it. Yet, the most difficult challenges are people - not machines. So, you did effectively nothing to detect where the people problem lied and prepare the ground to deal with that as well. And when that blew in your face you just left and say the story like there was nothing you could do about it.