Initially, I believed this job might be a scam since I received a calendar invite from someone in the UK at 4am. I went through five rounds of interviews with this company, consistently impressing them with my skills. However, during my second technical interview, I had an unpleasant experience with an interviewer who seemed annoyed throughout. In the end, he asked me how I would improve a particular question to prevent similar mistakes. I provided an answer, but he claimed that the approach I suggested was impossible, which was sorely mistaken. This situation has left me feeling confused. Despite investing two months into the process and reaching the final round of interviews, I discovered that I wasn't deemed qualified enough by the end of the second round.