Treatspace interview questions

I had a brief phone interview and then was asked to complete a trial assignment. After spending hours to create the work, I had another very positive interview. Two business days later, I was rejected. I really feel like they wasted my time and already had their decision made, considering the swift rejection.

Met with Directors of Operations and Product for a screening. Then met with them plus CEO. Did a third interview in which I presented a slide deck they asked me to prepare as a sample.