LinkedIn Site Reliability Engineering Manager interview questions

It started with the LinkedIn recruiter contacting me for a leadership position. It was followed by a basic technical questionnaire and then two one-hour phone interviews, including a coding exercise. The next stage was onsite interview that included their standard six modules. The interview experience was very great until then. What followed it completely surprised me and I lost all the respect for the company. I was called in for a second onsite interview with the management which went on for over five hours. I did really well and thought I was in. I was totally surprised when they said they found me too "strong" and hence they wouldn't hire. The very next day, they promoted their internal candidate to the manager position that I was being interviewed for. That employee was one of the folks who had interviewed me! This is totally unethical! It is a complete shame that the company that prides itself in building the solution for job seekers has no respect for human emotions. I wasted my time obsessing over this company and making thorough preparation for the interview. It broke my heart.