Amazon Software Development Engineer interview questions

In the past month I've been contacted by 3 different Amazon Recruiters for various positions ranging from Data Engineer, to AI/ML, to SDE. For the Data Engineer contact I responded I was interested about 90 minutes after the ping. I was ghosted and a month later got a "I don't have that position any longer." For the AI/ML position I indicated that my AI/ML is a bit light, they asked for a resume, and then I was ghosted. Honestly that's understandably not a perfect fit, but an acknowledgement of receipt would be the professional approach. Then I was contacted for an SDE. In fact I received the same form email twice within a 30 minute span, never a great sign. I put time on their calendar, sat on Chime, and no one joined. I emailed while waiting and got a response 45 minutes later with no explanation other than "are you available tomorrow" I said yes, they proposed a time, I agreed, and they ghosted me, again. So that's 3 strikes. Arguably the most unprofessional and incompetent recruiting division in the industry. Am I to assume a sub-par hiring process also leads to a sub-par workforce? Being the first and most basic step in the interview process, this is a really bad look for Amazon.

3 rounds of interviews all were compulsory, 2 dsa questions were asked in each interview. all were easy to medium leetcode. and the last round was a bit of managerial.