Initially had a screening call with a recruiter, and he moved me to the next step, where I had 2 one-hour zoom calls with the hiring manager and another PM. Up until this point, everything was great. What really set me off is the lack of response after that. I interviewed on a Monday in the first week of November, and I was promised to have feedback the same week. I waited until Friday that week, still no response, which I understand, because everybody is busy and things happen, so I thought I will wait till the following week. Then the following Monday nothing, Tuesday still nothing, on Wednesday I sent a follow-up email and got no reply, I sent another follow-up on Thursday, total silence. I understand if I'm not your top candidate and you are not moving me to the next round, but the least you can do is to send an update email or maybe even an automated rejection email would do.