Sard Verbinnen & Co. interview questions

Began with HR informational interview which was very basic, followed by two mid-level interviews about company and more technical skills / cultural fit and then I received an offer. Process felt very drawn out and didn't hear back for a while

After sending in my CV and cover letter, I was invited to two initial interviews, an assessment task (at home) and an HR interview. (The total process took about 1.5months.) And then I didn't hear back for 2 weeks. When I wrote an email to ask about my application, I received a short email saying they found someone else for the role. I didn't get any feedback in between the interviews or afterwards. Really bad communication, not a great way to treat applicants.