Mehiläinen interview questions

After around one month of waiting, I finally got he rejection letter for CV screening which didn't contain enough information the reasons of the rejection. I would at least like to know it a bit eariler after they made the decision to not continue

First round with talent acquisitor, second round with HR, third and final round is with tech people. Each round is very general and friendly back and forth conversation. Tech interview didn't have any puzzles or anything, but was talk about past projects and generic talk about different technologies etc.