Microsoft Developer interview questions

Similar to other opinions here, my experience was a long and painful process of 6 interviews with different people from the company. After the initial call from the recruiter, you do a short leetcode style problem as screening. After that, they schedule 4 more interviews in the same week without being very clear about what these interviews will be about. I don't really understand why they act so mysterious about these interviews, but for people applying in my case all 4 interviews had 30 min of behavioral questions and then 30 minutes of either leetcode problems or system design. For this role was 3 interviews with leetcode problems and 1 of system design. Once you finish all this process all you get is silence. Weeks go on and zero answer even if you contact the recruiters directly. I understand that I did not get the job, but after having dedicated so much time and effort, having interviews at 7 PM on a Friday to accommodate for US time zone, the least they could do is to let you know the outcome. I read about this behavior on other glassdoor comments and I could not believe it until I experimented myself. It seems like, you either get an offer or you get silence. I think they should review this approach as it as it feels disrespectful to candidates investing so much in the process.