Revolut Operations Manager interview questions

I applied through LinkedIn and within 30 minutes, a recruiter had reached out to say that my skillet matches and asked me to arrange a video interview. This part of the process was quite nice. There was a lot of flexibility when choosing an interview time. The video interview experience was mostly positive. At the beginning, the recruiter seemed a little distant and it was clear he was reading the job spec & company profile directly from a word document on his screen but once we started actually conversing he was engaged and had good detail on what the role entailed. The next step of the interview was the take-home assignment. This involves data analysis through either excel or a coding language of your choice. I've been in the field of operations & analysis at a global tech giant for over 3 years. The task took roughly 5.5 hours of work to complete, including analysis & creation of a presentation. The time frame given was 1 week from receipt of the assignment. I returned the assignment within the 7 days. This was when things started to decline. Receipt of my task was acknowledged within a day but then for 1.5 weeks I heard no feedback. I followed up with the recruiter and she told me that my task was scheduled for review that day. I was assured I would be informed of the decision regardless of the outcome 4.5 weeks later I sent a final email, resigned to the fact I wasn't going to get the job but curious to hear where I was lacking in my take home assignment. The recruiter replied that evening and said that unfortunately my assignment didn't his the key points they were looking for. Follow up looking for specifics was met with vague answers and told "None of the key points were hit" when I asked what in particular I didn't do, and pointed out the lack of fairness of the situation with time input vs feedback on what was missing, I was told that the operations manager didn't give specifics. Entirely vague, somewhat doubtful and in my opinion unfair.