ROI DNA Account Manager interview questions

It was a very thorough interview process over the duration of about 3-4 weeks. I met with upwards of 10 different people over 4-5 rounds, including the CEO and COO. Each interview went well and I got lots of positive feedback, including statements like "you are very impressive" and "I think your experience is a good fit for what we are looking for." One would think that they were extremely interested in me, with the final HR round telling me all about their benefits and next steps for onboarding. Needless to say, I was more than stunned to hear that they decided to not give me an offer because they "weren't sure I was qualified for the role." Hmmm, that's a bit fishy since I spent 6+ hours, over 3-4 weeks interviewing with various folks who all said I was a great fit! What a WASTE of time. Someone on the team even told me that they were "interviewing for a while because they couldn't find a good fit" - go figure! With 12+ years of marketing and advertising experience in the industry, being told that I'm not "qualified for an account manager role" - a basic job in the industry - was not only outrageous but insulting. What a huge loss on your part. Never been treated so disrespectful through interviewing in my entire life.