When I first started out having orgasms, I could pretty much only orgasm from clitoral stimulation alone - anything vaginal as well was just distracting, and anal wasn't even on my radar
Since then, I've tried more things out, and now love penetration and clitoral stimulation at the same time but...I 've never really managed to get along with is G-spot stimulation. I mean, I guess it might help if I could even find it
I don't think it's unusual. My partners favourite vibrator is a little slimline g-spot vibe that works great for her but the ration of g spot to clit has to be mostly clit. Intercourse also gets a little uncomfortable for her if she gets too much stimulation internally as well.
Oddly enough, she comes from anal only and that's G-spot stimulation but I have a theory that the reason it doesn't work vaginally is because she is too sensitive and anal gives a bit different and damped down sensation which works for her.
As for the curve, I do t think it's really even necessary, why not try a slim little straight vibe and see if that's an improvement.