Stibo Systems interview questions

I applied through a recruiter. The process was supposed to be several interviews (company fit and technical skills). After an interview with a project manager, I got a take-home assignment and completed it. I sent the task for review and a week later got a reject email saying there was a candidate with a better psychological fit. I asked but didn't get any further feedback or take-home assignment review results which could be helpful. A bit of a time waste in general, would be reasonable from their side to give a bit more feedback if they give take-home assignments.

Other than the initial call with the recruiter, I had 3 video calls. 1. Hiring Manager 2. 3 Team members/Team Leads 3. Case study style where I was provided a business case an hour before and had to give a verbal explanation of my findings. Attendees were a combination of team members I spoke with prior, the hiring manager, and other team members. I received an offer and countered. The recruiter told me the offer was at the max of its range and was sorry they could not accommodate my counter. I asked if I could have more time to consider the original offer and was ghosted. I did ask for the salary range in the first screening and was not told what it was - only that my current salary was in the range. Please work on your recruiter's training and how they deal with acceptances or counters. This is VERY unprofessional and wasted several hours of my time.