Amazon Sr. Software Engineer interview questions

Recruiter call, then technical phone screen with coding question and about the project experience. After phone screen, onsite with 5 rounds. Onsite includes behavioral question in each round and technical coding/system design question, object oriented design question.

after i did three time applications, they directly said no consideration even though my experience satisfies their requirment. it is so sad to get the outcomes. I don't know the reason