Mendix UX Researcher interview questions

The interview process has been smooth - very fast, clear comm. BUT, at the end of the process, the let me wait 2 weeks and and the end just sent me a mail saying they were not making and offer. I've done 3 interviews in total, one of which was F2F and it included a portfolio presentation. When you get to such a stage, I do think companies should take the time to provide with clear feedback either via mail o call. 5 minutes call is needed when you've invested hours and money to interview