Ciena Senior Software Engineer- C# interview questions

There were total five rounds. First written test based on C# and Data structure. I cleared that and answered all questions. Then I went for face to face round In which all question were on .net c#. I gave answer for almost all questions only 2 I was not able to give proper answer out of 12 to 15. and Interview has not much questions to ask and he was not able to judge me then why he was there i do not know, I done with interview for 1 hour 15 min around ans was waiting outside, suddenly hr came and told me you are not selected in second round, I want to say one thing to Ciena if you have do not have good interviewer please do not waste the time of others and shut down the company. I openly challenge the interviewer for one to one discussion.