Deloitte Front End Developer interview questions

As per consultant it was a referral interview it's not walkin . I reached at 11.30am after all entry process i reached at 12am in main location where there are more than 200 employees are there after that more 200 employees came up I waited till 4.30pm for first round they not even given snacks nothing after that they told me to wait I waited for an hour for feedback. At 5.30pm they called 6-7 people outsite and tell sorry try after 6 months. WTF why you calling so much of exp. people and give each candidate fixed slot timing come at this time and followed back many times. We were waiting for no reason they don't even know 300+ candidate will come. Most of the people told me they cleared online test after that they come there and waiting from morning to evening for 20 mints of interview and they selected 2-3 people from 300+ people. Mismanagement no water no snacks nothing.