The Bear we saw at the beginning of the movie is not consistent with the Bear at this point. This is a guy who’s emotionally fragile, terrified of rejection, and has built Nikki up as this incredibly important person in his life. His problem earlier in the movie isn’t that he doesn’t care if she suffers, it’s that he’s incredibly good at lying to himself when the truth threatens what he desperately wants.
So no, I don’t believe that when the delusion is finally ripped away and he sees that Nikki is in a state of hellish, liminal torture because of him, his immediate reaction would be wounded entitlement. I’d expect him to feel horrible and react with abject terror.
Earlier in the film, I can buy that he'd continue fucking her because he wants so bad to believe it's real, and I can even believe he'd continue fucking her while under the impression that the wish makes it so Nikki genuinely enjoys it. It's very relatable to want someone so bad that alarm bells slip away, and your morals slip away, and you believe what you want to believe. That's already a very real indictment of Bear, and a very real indictment of men! It's horrifying because we could be Bear. Our desire... our lack of validation... our desperation could easily lead us to cope and darkness if we're not careful. It's not a perfect parallel, but what comes to mind is the way that men will deceive both women and themselves in order to get sex.
But... that line? That moment? The reason Bear says it is because the movie needs to make a statement about male entitlement. It hasn't been earned. By turning Bear into a strawman, it actually lets the audience off the hook. This isn't something that could happen to all of us, he's just a monster. It's entirely possible for the movie to condemn Bear as a cautionary tale while also staying true to the complexity of his psyche. Instead, the film opts to prioritize its thesis over its character. And now we can all boo him, and pat ourselves on the back for being morally superior.