Optiv interview questions

Avoid! Got to the 5th and final round after 2 months of a video tape recording(s) and 2 previous face-to-face interviews. At the final interview, 2 of the 3 people did not turn up. I was left with one woman who was completely uninterested - kept checking her instant messenger as she was talking to me. The questions were flat and just plain awful - for the final round of interviews, it was just plain awful. At the end, I left the building baffled and confused. I reached out to them, asking when we could all meet again (bearing in mind 2 out of 3 were not there), but no reply to email. Then I saw that they had posted the job on LinkedIn, 3 days before they bothered to contact me to say I didn't get the job (almost a week after they said they would call). They stated that I lacked a skill-set - that was neither mentioned during the whole 2 month interview process, nor was stated in the brand new job description (that was posted on LinkedIn). There is something seriously wrong with the communication and hiring process here.