Alloy Backend Developer interview questions

Had 2 intros, coding challenge and then system design. The interviewers were very nice. I didn't do the best in the coding challenge although it was quite simple. They decided to proceed and invited me for a system design thing. I was asked to design an analytics data pipeline. Pretty trivial and easy if you have experience designing backend systems. I designed much more complicated things just in the past few months. Anyways, I thought I did well since the guy at the end was quite happy about it and said that I pretty much designed what they currently have, so I was positive. Surprisingly after that, and silence of about a week (?), they said they don't want to continue the process. After asking for feedback, they said that I didn't do well in the coding challenge (So why you even bother continuing) and that in the system design I didn't ask enough questions. Now I did ask a LOT of question before starting the design. More than usual, as the guy that was interviewing me wasn't a native english speaker and it was quite hard understanding the assignment. At the end, after I did in fact ask a lot of questions and did design it very well (I was doing tons of those interviews, I tend to believe I did well) apparently that wasn't enough :( Too bad, they did leave a good impression, I just think that whether I got another interviewer for the system design I would probably get an offer