Very tough on themselves
Well, my daughters are consistent. As brutal as they are to their families (virtually a reign of terror) they are as tough on themselves. For all my daughters being a handful they are excellent students as well as student athletes. No matter, they routinely pronounce themselves idiots and unfit to survive in this world, and none of that is true. Very tough on themselves, and I know all teenage girls are the same way.
I try and support them, in between being savaged by one or the other. Definitely a mine field (and mind field) of sorts. Looking forward to hearing from other dads and their survival tactics.