F5 Senior Program Manager, Talent Management interview questions

I was contacted three times to apply for the role and had 3 informal conversations with the hiring manager. Once I decided to go for the role, I had a quick conversation with a recruiter. Then 4 loop interviews. From applying to final interview was 3 business days. They then took 5 weeks to respond. I followed up once weekly with the hiring manager and recruiter. Emails and text would go unreturned. When I would get responses they would say "next week". On week 5 I received an email declining to make an offer. Overall, the hiring manager should have considered if they would have offered me the role prior to encouraging me to apply. As a professional courtesy, considering there was an existing relationship, I thought deeply if I would take the role if given an offer before applying. It seemed disrespectful to go through the process if I didn't actually want the role. I expected the same courtesy in return.