Stripe Recriter interview questions

Screen with Recruiter, HM Call, and panel. Over the last few months I have interviewed with 5 reputable technology firms and am disappointed to say Stripe has been the biggest let down on candidate experience. Naturally curious, after completing the final round interview I followed up with the Recruiter a few days later. To my shock, she didn't even respond and just forwarded the email straight to the Hiring Manager as not long after the Hiring Manager sent me a rejection email ..... a rejection email! After completing 5 hours of interviews in total, they did not have the decency to call with feedback. I’ve been in recruitment 5+ years and have never heard of a rejection email after a final interview. This portrays a sheer lack of professionalism and compassion in an employer, frankly very glad I dodged that bullet.