Veeam Software QA Engineer interview questions

I was sent a test with 4 questions. I submitted the test with all answers and then sent to the company. I got an answer that I didn't pass. I asked for feedback but didn't get normal answer.

The process took around a month. Now I feel like I should warn everybody about it. Also I asked HR for feedback 4 times and all they said it's "We expected more quality". But if they don't provide any requirements to the task, what could "Quality" means? Quality == fulfilled requirements. If you don't provide any requirements, you can't ask for abstract quality. It feels like it's totally fake hiring process to show investors that they're growing. All I could find on the internet - it's bad reviews, saying that their managers force employees to write good reviews. After their hiring process I feel that it's true. Also after every "failed" attempt they offered me another position (on higher levels, what?). After the second attempt ( 4 total hours of tech interview, live coding, 2 home test tasks, 1 hour test) I decided that 3rd interview - its too much. The whole technical interview looks like an attempt to make you nervous. The first interview was good and I even liked the interview, despite the fact that it lasted 2 hours. The second time there were several interviewers, one of whom periodically giggled and rolled his eyes. I understand such a stress test, because the employees themselves hinted at the interview that it is very hard to work, everything is rather chaotic, overworking hours is also in the order of things.