Fragen im Vorstellungsgespräch für Beschäftigung als Software Development Engineer Software Development Engineer In Test bei Amazon

I applied through LinkedIn with reference. As usual, I received OA with middle LeetCode questions, which were pretty hard for me. After 4 month I was asked for Screening Interview, where recruiter explained me my interview path in 15 min. I scheduled my interview, but one day before I received an email about rescheduling and I was asked to give my schedule which I did. After one week I received another email, recruiter told me that the schedule doesn't work for them and I need to give another one (which is strange because I gave the whole week with business hours from 9 am till 6 pm). As soon as I sent my new schedule, I received the email that my position was filled already. This is the end of the story.