Opendoor interview questions

Interview process started off great... then it wasn't. I was not actively looking, but open to opportunities. A recruiter reached out to me on Linkedin and I had a positive phone screen. Few days later I had a 30 min phone interview with the hiring manager. A week later I was brought in for a 3 hour interview (4 x 30 min 1:1s and a 45 minute presentation). The team seemed impressed with my presentation and the interviews also seemed positive. I heard back from the recruiter a few days later who said they were wrapping up interviews and would have an update the following week. After not hearing from the recruiter, I followed up. Same response, still interviewing. I followed up again a week later and the recruiter said they had not made a decision but would have news "the beginning of next week". After following up 3-4 times and never hearing back I've just had the worst impression of the company and lost all interest.

Couldn't even get to the interview process despite ~20 years experience and checking off all of the requirements and bonus requirements for the job. What gives? Is this an example of more ageism in tech?