I'd call it the worst process I've ever had and this is not because I was not accepted, that's ok. This is because the process lasted 5 weeks and what I got from it? Nothing, zero, void.

I asked for feedback from the HR and my interviewers from the last management interview. No one answered anything. What exactly was not ok comparing to other candidates? Is this is really a difficult question? "We will keep your records and reach out should a relevant opportunity open up." You have open positions, I wasn't proposed another one, though I got this "Though we were impressed with your skills and experience during our process together". Why? How would I improve my skills for other interviews if you give me nothing and why would I apply for any role in your company again after this? Don't waste your time with them, there are better companies who treat candidates the way they deserve.