Apple Product Design Engineer interview questions

This was for the Soft Goods team. Had a quick chat with a recruiter then had a phone interview with an engineer. Got asked some weird questions about quality control even though that's not my area. Interview went well seeing how they gave me a design challenge for the next interview phase. Overall, Apple is very secretive and it seems like they keep you at arms length away from them. During the whole process it was difficult to gauge how I was doing during the entire process and they didn't provide very much feedback.

15 minute interview with recruiter, followed by a 30 minute interview with hiring manger. They then gave me a 'design challenge', that they wanted me to complete in one week. I submitted a detailed design report, and received feedback that I should create a presentation. Upon creating the presentation, I was told that I didn't do well on the design challenge. I was given specific feedback on the design challenge (which areas I should give details for in my design). Surprisingly, ALL of those highlighted things were in my report! I don't think the hiring manager even read my report, because if they did, they would find that all of their highlighted areas were mentioned. I felt extremely demotivated, I felt that Apple did not really care for their employees. I felt they were super unprofessional as well, not even reading my submission fully.