Sorry, jawbreakerbeach.
Did you have a cant pre-op? I know you said it worsened, but was it there before albeit less obvious? I often wonder, for people who have some frontal asymmetry pre-op, even if it's partially corrected with surgery maybe part of the reason it can appear worse is because of the advancement. So, a person starts crooked, it's partially corrected with surgery, but it actually appears worse because everything was also advanced. I'm not sure if that makes any sense or not; it's just a thought.
If both your smile appears crooked and you also favor talking out of one side of your mouth, any chance that could just be muscular? Could you do physical therapy (or something) for that? If you can find a good acupuncturist, and have a little money to throw at the problem, would you be open to acupuncture? I'm not suggesting it's going to fix anything, but it may offer some help/improvement.
Also, from one former athlete to another, yes, eventually you have to care how it feels. You f**king deserve to not be in pain all the damn time. My family jokes that one day I could be dying, and I'll be smiling and laughing saying, "Oh, it's only a flesh wound, it's all good, no worries." I'm just saying that as a friendly, compassionate reminder that being in pain is not normal (referring to chronic stuff, not acute). Anyway, obviously more surgery won't fix numbness, but if you're actually in pain and/or cannot move your mouth properly I think that's a different story.
I'm sure this is hugely subjective, but I think a picture taken straight on will show flaws that people never notice in person. I think that's why most people are inclined to tilt/angle their face for pictures. Maybe your SO (and everyone else) seriously doesn't see the issue when they're talking to you?
Take care