Criteo Software Engineer interview questions

I had to go through 2 full loops of interviews for different positions. I was told initially that i will get an offer after the first loop, then i was told they are looking for someone more experienced and i can interview for a different position. After the second interview loop, i was told that they are looking for someone who is based in USA rather than Canada. Basically they wasted a few hours of my time and did not provide any constructive feedback.

I had a phone call with HR, followed by two coding exams. Subsequently, I had a meeting with the engineering manager and later met with a team lead. Throughout these interactions, everything went well, and I was informed by HR that they were in the process of preparing an offer for me. However, despite their initial assurance, I never received any further communication from them. I made multiple attempts to reach out to HR, but on each occasion, I was informed that they were still in the process of preparing the offer. I must acknowledge that during the exams, the staff was genuinely supportive and friendly. Despite these positive experiences, I find myself dissatisfied as I never received a clear explanation for not receiving the offer. It seems that the company's actions do not align with the value they advertise for their employees.