Agreed if you are saying the normal process of customer trial/testing and feedback for further feature development was sufficient to cause a delay in considering the product adequate for sale. This happens so routinely, not rattled at all by this.
This expectation is too high. Having been the guy that has purchased tools for business for large corporations, I can say, firstly, that I seldom offered any such PR, and secondly most PRs from Tier A companies go through a strict legal and business review process, and therefore handing them out to tiny software vendors is quite impractical, it just is.
The rest of your points aren't really EVIDENCE, but the lack thereof. The lack of evidence that success matches projected/speculated success.