These are excellent opportunities to sit down with the junior engineer and explain how organizations are complex, incomprehensible decisions are often made from a birds eye view with a longer-term view (in good organizations), and that we all need to be patient and teachable to grow. I've seen too many older people who have never gone through this mentorship, and they still can't understand why nobody listens to them or promotes them. They just become very angry toxic people. Nip it in the bud when they're young to help them get the right attitude of wanting to learn and wanting to collaborate with others; that could be the difference between someone becoming a productive and successful person later in life and someone becoming a bitter and unsuccessful person.

Yes, there are some young people who can't be helped. But I imagine most can be helped. I used to be young and arrogant too.