Amazon Software Engineer Internship interview questions

I was given an IQ test followed by 7 easy debugging problems. They were all easy, most of them are just changing one or adding brackets here and there. Than I got a coding assessment and then final phone interview. The phone interview went really well the engineer even said "Oh that's good, I like that" to one of my marginal optimizations. I thought I got it but I received my rejection about 2-3 weeks later. The process is very time consuming, the recruiters were very difficult to reach and unprofessional, I am disappointed with Amazon.