Every other part of what you're saying is not, however. It's much closer to a recipe for destroying someone's self-confidence instead. I dunno how much you know about psychology (not much I'd wager judging by what you've said here) but it's a known fact that positive reinforcement is FAR more successful at helping someone improve than just shitting all over their efforts.
All that you said won't change that feels DO NOT overcome facts, NEVER. And it's better to destroy their self-confidence than to give them hope which is far more cruel.
... I can say from having experienced innumerable occasions of comparatively brief yet nonetheless harmful phases of self-loathing (induced by in large part by some verbal ironing (yes, "ironing" is how we call it here) by my grandma during my formative years) that I beg to differ. Even temporarily crushing one's self-confidence... In my case me most often being the one to be doing that crushing... Is much worse and cruel, speaking from personal experience (though, unfortunately for my side of the debate, nevertheless being just apocryphal evidence).