Capital One Senoir Software Engineer interview questions

I was contacted by an HR recruiter who found me on Hired. We did the initial phone screening, which was very positive. And then I was given a take home test on HackerRank. It was supposed to only take 2-4 hours according to the recruiter, but I don't see how that was even remotely possible given the amount of work required to complete the solution. After spending TWO DAYS (off and on) of making sure the solution passed all of the testing features using Cucumber as well as the new features I was supposed to create, I submitted the solution that I considered clean and concise. I had to wait an entire week before receiving a rejection notice. When I asked the recruiter if he could collect any feedback for rejecting my WORKING solution, he said he would try to get it for me, but I have not heard back since then. Rejecting a candidate on a long take home assignment who provided a working solution AND not providing any feedback is never acceptable.