Adyen Software Developer interview questions

1 Phone Interview 2 Technical task 3 Phone interview about technical task 4 Final round of interviews at the headquarters (3 in a row) They took me to Amsterdam for the 4th stage, the final round of interviews. The 1st interviewer was completely lost, he asked his partner what they were supposed to do and he thought I was on the 3rd stage. He was about to review the code task, but then realized the mistake and started making questions. He clearly didn't prepare the interview. After that, instead of getting into the 2nd interview the recruiter came to the room and told me that I didn't pass the 1st and I wouldn't have the next interviews to not "waste people's time". The reason? "The interviewer was expecting more detail in your answers". He basically came unprepared, made generic questions and then complained about the lack of detail in my answers. I've never seen an interview round being aborted like that even in the most picky innovation companies. Which kind of company brings a candidate to the last stage and dismiss him abruptly because of ONE opinion of an unprepared interviewer? Long process, unfair, embarrassing and huge waste of time. And needless to say that the recruiter promised a detailed feedback that never came.