Went through 4 interviews just not to be hired. In the 2nd interview I did not meet the expectations of my knowledge of Excel so the manager asked me to create a presentation on what I learned. So I spent the whole weekend teaching myself advanced Excel shortcuts. I used a YouTuber to help me learn. When I used his content in my slideshow the interviewer thought I was plagiarizing. Also their company does not allow users outside of their organization to screen share, so I couldn't even show my interviewer my presentation. So I was called a liar, a cheater, asked to "study" and create a presentation over a weekend where I wasn't paid for, all to not be hired. This interviewer actually said I did really well despite insulting me, and made me think I had the job. I interviewed two more times with different teams and those interviews went really well. I heard NOTHING for over a month. So I emailed the hiring manager and she replied "Oh we hired someone else."
Terrible experience