Just move on, you deserve better job.

One door closed another window will open. Don't give up.

They are unprofessional in hiring. Just move on mate
You deserve to work in a better company and team

I would say the hiring manager is not professional, and the HR involved is not strong enough to push back to the hiring manager.

Don't feel upset, polish your skills and if in future some other roles in that MNC comes up, they will hire you with big dollars.

Treat it as a challenge to make yourself stronger.
The more rejections you got, the more experiences you gain.