Crytek Rendering Engineer interview questions

I passed the first technical online interview and then the recruiter messaged me "the impression of our programmers is very positive so we like to move you to the next step which is a 7days-timed project". I got it and worked on it very hard. I'd like to mention I worked on about 5 different ideas to get the best result then selected one, optimized it, and hand it in. I was sure that showing my ability to think and work on different ideas in a short time is a big advantage so plus to the main program which was clean and optimized I sent all my works to them with a descriptive document. After about 3 weeks I got their completely negative feedback. I don't want to go over the details but their reasons to criticize my work were shocking. At first, I should say that I'm sure my code was not perfect but almost all their reasons were irrelevant. They mention my efforts to implement different ideas and compare them as a negative point!!! How on earth is it possible? I confused when saw some reasons like "You didn't do that in your code" when I'd exactly done it. they accused me not to write some piece of my code. Ridiculous, right? I asked them how they concluded that and if they don't accept their own assessment approach!!, then let's have another online conversation about my work then judge my abilities. but I haven't got any further response. My Conclusion was the project which I'd invested a complete week on that was reviewed by a lazy person just in an hour. My advice for you is to value your time and personality and don't let others ( it doesn't matter what name and brand the company has got) disrespect you.