Of course, my daughter is learning the most complex skill any of us has ever learned: language. And it’s not for lack of trying (lately at 5 in the morning). She’s sticking with it though (as I write this, in fact). At times there is frustration, and even some crying, but no signs of wanting to give up yet. In fact, the frustration and crying seem to make her want to practice more.
There are also no signs that she is blaming herself, cursing herself (I guess that would be progress with her particular task), or comparing herself to others. This seems instructive.