I had 4 four rounds of interviews with them and was told they would get back to me for the final decision. They never got back to me and when I sent a follow-up email, I saw it was opened but no response

First screening with the data chief officer. Was pretty simple, just a conversation about your skills and a resume. Then, they give you a giant assessment hosted through Hackerrank. It says you won't spend more than 3-4 hours but in fact, it took me 2 full days to finish it. They give you 3 days. You will find some simple logic questions, as well as leetcode medium and hard coding along with a couple of database questions. If they like your assessment, they invite you to the final round. They don't have an HR person and all communication is managed between you and a data chief officer. The communication is terrible, I have never been treated with less respect than this. The DCO responds once in 10 days, and you almost have to beg him for a response. Although I was invited to the "last round", DCO never scheduled one for me. The who application process took like 2 months. Guys, I would recommend focusing on other opportunities and just skipping this one. Pure waste of time. For reference, the last round would be a 30-60min discussion with management and a couple of virtual whiteboard questions on databases. Don't waste your time like me. Stay away. Very unprofessional.