NetBrain Technologies Technical Support Engineer interview questions

Apparently the "Global Talent Acquisition Manager" was the point of contact for the entire recruitment process. Although this review might sound like from sour grapes, it is far from it and attempts to shed light on the negative first-hand experience. The recruiter sends an email demanding for an interview availability with the most unprofessional email etiquette. I decided to respond as I was excited at the opportunity. The interview is scheduled for one round the next week after which I receive another email stating that they would like to schedule another interview which would be a series of 5 calls. Out of the 5 calls, one was the technical round in which I was supposed to demo the product which is absurd since it should be the other way round given that you are supposed to be trained by the company on the product that you are hired to support! The other rounds are basic personality rounds with management. A week later, salary is discussed and they proceed with background verification. Silence from their end for about a week. I follow-up and the recruiter reveals that the role has been placed on hold and the recruiter stated that it will come off hold after a month. I follow-up a month later and recruiter says the role has been filled and I am no longer under consideration. The professionalism/integrity or the lack thereof should have been my telltale signs to quit pursuing the opportunity at this organization.