You don’t call 911 if a neighboring couple has Shalom Bayis problems where they get into a shouting match every 3 weeks, as the OP described
He didn’t say 911, he suggested shomrim or police. He also never said neighborhood couple, shalom bayis or shouting match. He said raised voices and shrieks. You seem to have a reference point of that being a couple ‘interacting’ but it could very well be any loud or out of control family member and any other family member including a small child.
His Rov is correct.
You have no idea if his Rov is correct or not because you don’t have anymore information than anyone else. Even if he has to adhere to his Rov’s instructions of allowing the Rov to address it (which is NOT the same as leaving it be) you still don’t know if it was correct. You just like to be caustic.