Microsoft Senior Software Engineer interview questions

I applied to an ad for Berlin, and I have learned later that this ad was for multiple locations in Europe and there were no open positions for Berlin. They contacted me with an email to have a quick phone screen almost a month later. Then after that they've sent a codility test. Which I've passed easily. After the codility test they set up 4 interviews as a "hiring event". And due to COVID-19 all was to be done online. The day before one of the interviews were cancelled. And I had completed other three interviews. But didn't get a feedback for 10 days. After that I have emailed to the recruiter about feedback on the interview. She told me that she has moved to other projects and another person will contact me about it. After another week I was called by another recruiter and he said that feedback from that 3 interview was positive and they want to have a replacement interview for the cancelled one. And I will be contacted for that interview in a couple of days. Two weeks passed and there were no contact. And I did not remember the name of the new recruiter and did not have his email but used the contact recruiter button on the Microsoft Action Center and asked them about this interview. That was almost a month ago and MS did not contact me since. It's been almost 5 months since I applied and almost a month and a half since last contact I have received from MS. And I am really dissapointed how unprofessionally handled my process.

HRs from microsoft are nothing but unprofessional and impossible, not that they are enough to be careless(for not informing that we have one more round and the panel is already waiting for us)during the interview, after clearing 3 rounds, the next person is oblivious to the solution you are giving and simply asks "i want a DP solution" and says wrap it up as i need to run off to a meeting . You are supposed to atleast discuss with candidate, this is not a one word answer question . Please be professional