I work at Amazon, I interview a lot, in fact I teach an internal course for conducting interviews. What you experienced is 100% against our policies, and what we teach interviewers.
You don't give candidates negative feedback like that.
And you never ever EVER end an interview loop early. EVER. You finish the day. You collect as much data as you can. And you let the recruiters reject candidates if and only if everyone has submitted their feedback into an internal tool (without being able to see other people's feedback first), and then discussed it.
I kind of want to see if I can reach out to you another way to find out your info so that I can find what bar raiser/hiring manager you had and have a word with him.