ServiceNow interview questions

I went through 3 interviews including a panel presentation interview that I prepared for. One of the interviewers didn't even seem like they wanted to be there, but it seemed to go well regardless. I was left with silence from HR for over 2 weeks, then I sent another follow up email to be told I wasn't chosen. Not very professional to let a candidate get that far in an interview process to be kept in the dark for that long, who knows if I would have received a response if I hadn't asked for an update.