Not necessarily. When one of my sons was younger, we had a similar issue. He got mad and moved in with her and her mother (the mother was a real piece of work - the girl completely ran that house!) Within 3 months, he was coming over every Sunday for dinner (without the girlfriend). Within 6 months, he was begging to come home. Now, almost 4 years later, he thanks me for taking the stand I did - it helped him to see who she really was and what a mistake he was making.
Only if you’ve set a sleazy low bar of behavior. My kids would never disrespect me this way! Apparently RG has some decency in him.