Kaspersky interview questions

I went through 2 rounds of interviewing, questions were relatively manageable and somewhat similar for both rounds. Interviewers were friendly and approachable, and I think both my interviews took roughly 30-40 minutes.

I applied on Linkedin and got a message from HR few days later. I was eventually heading for 4 rounds of interviews : ITW with HR, Technical & Skills test, ITW with  Managers and lastly interview with the Head of Departement. I went throught the whole recruitment process and it lasted over a month.  During the last interview with the Head of Departement, I was introduced to the organizational chart, got indications that I could hear about their definitive decision two weeks after. Unfortunately I had no feedback. I've sent two emails to the HR just to ask for some visibility but I kept being ghosted. As a job seeker I feel like I lost a precious time, had to put away some opportunities because I was in a recruiting process and I was really interested by the possibility of integrating this company. Very negative experience for me, I hope Kaspersky doesn't treat all rejected candidates like this.