Here's the thing about "fixing" Russhole: It might be possible to correct his behavior, but nothing will ever actually stop his thought processes that result in that behavior. And to even hope of making any improvements in his behavior would take a LOT of hard work. It would likely require a mental health expert being right with Shit-lips 24/7/365 or otherwise monitoring everything he says and does and having an immediate way to communicate with him that Russ couldn't turn off, remove, or otherwise ignore. Every time Russhole did or said something creepy, stupid, or inappropriate the mental health professional would need to immediately address it and then do something to make Shit-lips associate it with something negative or uncomfortable, like an electric shock. Someone earlier in the thread mentioned the Dog Whisperer, and it would be a lot like training a dog. Russhole wouldn't really understand WHY it was a bad thing, because he's incapable of introspection, only that it is a bad thing and he shouldn't do it.
There are a number of serious problems working against Rat-mouth. The most obvious and likely the biggest issue is his narcissism. He believes that he's hot shit on a bun, with twin turbos and the luxury package. He's also convinced himself that he's a victim and any time things don't go his way it's Kiwi Farms/Taylor Swift/Greg Skordas/shallow bitches/the universe working against him unfairly. He is also unintelligent and likely has major mental illness aside from the narcissism working against him. We often say that Russhole has a script in his head of how people should act, what they should say, and how the world will work. It's a pretty apt way of putting it, and Russ' brain simply can't handle it when that script isn't followed. And that's just a short list of the problems working against him that make actually fixing him impossible and make correcting his behavior enough where he could mostly pass as normal very improbable.
In short, because of all his problems Shit-lips doesn't believe he HAS a problem and therefore doesn't see anything wrong with his behavior, even when people say that he has problems and he behaves inappropriately.
Russhole doesn't actually go out anywhere, especially not social places you'd expect to find single people to pick up on like singles bars or dance clubs. He does all his "wooing" online. So the chances of him hitting on a girl and her boyfriend decking him are slim-to-none. Likewise someone belting him because he starting ranting about "stuck up bitches" since he's really hard to understand. And as others have said, Russ talks big when he's safe behind his smart phone screen, but in person he's got a yellow streak down his back bone deep.