Mitiga interview questions

Traditional process, I talked to the head of HR based in Isreal, then the hiring manager, others on the team, CEO, then the COO and founder. The process took close to two months in total. Communication was clear until the last step in the process. Then after receiving positive feedback from the CEO and COO, they ghosted me. Took four attempts of me reaching out before they responded with a basic response of we decided to not move forward. I asked for feedback and nothing... Where has the business etiquette gone. They want you to be available after hours during the process, then zero feedback post process. If you spend seven rounds (near 8 hours) of time with a candidate, you should have the decency to give them real feedback.