Nestlé Procurement Business Partner interview questions

Fairly straight-forward: 1) phone screen with HR recruiter 2) phone screen with hiring manager 3) phone interview with different hiring manager 4) on-site interviews with the team. These interviews went well. My only frustration and the reason for the negative review is the lack of communication following the in-person interviews. I had to send the follow-up email after three weeks of radio silence only to discover an internal hire had been made. After all the time and effort the bare minimum would be to inform the candidate they were no longer being considered for the position.