The time between the first email of 'We'd like to move forward with you' to the rejection letter was seven weeks! There was a one-way video interview, two zoom call interviews, and a final in-person interview. The time between each of these was close to ten business days apart. The first zoom call was with two individuals, one of which was conducting a technical round of questions. When I stumbled on a single technical area, his attitude shifted and he became very rude. Very frustrating because it came off like he was questioning my honesty and torpedoing the interview. I wasn't hopeful of a second interview, but ten business days later, I got an email asking to schedule a second two-way round. The SRE was challenging with his technical questions, but was very respectful and I thought that interview went well. Another ten business days went by and then their HR emailed me that they intend to follow up with a third in-person interview with the hiring manager, who was OOO. Two weeks went by before I got the email to schedule the interview and I jumped on an early availability. That interview went well and the hiring manager said he would reach out to me with a final decision by the end of that week-- that never happened. Another 10 business days went by and I finally got a generic template rejection email. If a company is going to string someone out through four interviews over seven weeks, the very least that could be done is offer a call to provide feedback on what technical areas or skillsets I can improve on. So much time and effort into interview prep on advanced technical skillsets, only to be strung out and ghosted. Probably best it didn't work out, but a frustrating process.