The very first way I figured out how to have an orgasm was basically humping/rubbing up against a pillow or stuffed animal. Very, VERY indirect clitoral stimulation was what got me off for years.
I never had an orgasm from direct, manual stimulation, but I did start using vibrators a few years ago. No problem having an orgasm with a vibrator (takes a while sometimes, but it's a guaranteed orgasm!)
I still am almost incapable of having manual orgasms, and it's definitely tough with partners. I've had an orgasm with a partner TWICE, when my ex was actively trying, during oral sex, to get me off for a long time. And it was a little orgasm.
Just not something that seems to happen for me...
But I don't think toys have had much of an effect on it.