Thoughtworks interview questions

The First round is hackerrank round on DSA. it is medium level. Second round is screening round which is online just checks your communication levels. Third Round is code paring round which is totally based on OOPs.

This was the worst interview experience I ever had. The interview went well. I answered everything except may be 1 question in the technical round. I didn't clear the interview which is alright. I was given positive feedback in the interview and was told that I should start preparing for next round.I understand that there might be candidates better than me. But what horrified me was the feedback. In the area of improvement, I was recommended to upskill on some topics which was never discussed in the interview. I found this highly disappointing and unethical.