Your Rov, you indicated, would not do anything to reprimand or otherwise address this issue with the person you have a problem with. That should indicate a lot to you. The Rov’s not doing anything, even if asked as you said, says he thinks it best not to be brought up with him.
Much like the incident related above by Rabbi Weiss regarding the guy in shul passing gas. That is even worse than what you are experiencing and yet the Rov explicitly said he will not talk to or do anything regarding that Yid.