I did well in all interview rounds and was expecting offer, after 6 days i got below rejection email. I was totally disappointed.

Thank you so much for coming in to meet with everyone and prepare for the interviews. We know it’s an investment of your time and we sincerely appreciate it! I want to let you know that I have had the chance to meet with the team. They really enjoyed meeting with you but have decided to proceed forward with other candidates for the role at this time. I’m unable to provide feedback on the interview, but I do want to say thank you for taking the time to speak with the team.

Also please let me know if any recent policy changed in AWS for cooling period ? Do we need to wait 1-2 years to reapply?