Akamai Technical Program Manager II interview questions

I had a very terrible experience with the interview process, The dragged it unnecessarily long and the communication was no the best. I had a very terrible experience with the interview process, The dragged it unnecessarily long and the communication was no the best.

There were 8 rounds of interviews. Mostly technical with a few HR questions in between. Pathetic experience. I have heard from everyone that company is good and all so I was quite excited. But they took 8 rounds of interviews over 3 months and in the end told they chose someone senior over me, they feel I am a bit young for the job. Did they not know my age or experience in first interview. Wasted 3 months.