DRT Strategies interview questions

I was contacted for a potential opportunity. Had a phone screening, an hour-long phone interview, a 30-minute video interview, and about a 90-minute in-person interview, was hinted I was the selected candidate only to be told nearly 2 weeks later that the requirements changed. There's a lack of organization and I question the level of professionalism as I was dragged through multiple interviews and time was wasted by everyone.