Nearly everything Shallan, Wit, Ham, and Breeze say in the first books of SA and MB respectively fit that description in my mind

I haven't read mistborn, but Shallan is definitely supposed to be that way. At that point she's an abused child who's way out of her depth desperately struggling to fool the world and herself into thinking she's better than she is because if she doesn't she and the only people she sort of cares about will die penniless and miserable deaths. Half the time she knows everything she's saying is dumb and the other half of the time she's entirely in the other direction, high on her own shit, as it were (with comeuppance right around the corner).

Wit though, I can't really fathom what you mean by cringey there. He does consider being off-putting to be a calling with existential stakes, so maybe that's what you're picking up on? Did you find Hobb's writing to be cringey too? Because she perfected cringe characters I think, and I could sort of draw a line between the two if they were connected in your experience.