People make mistakes, Dear One (yourself included).  It happens.

Berating them for it, making them feel badly about it, attempting to scold or punish them for it, is not going to help, fix, or undo it,  is not going serve anyone or anything in any positive way.

Bitching, complaining, ranting, raving, and acting out, while it may feel good and appropriate in the moment, will not help them or you to turn things around, or improve the situation at all.

But, focusing your attention and energy on the desired outcome, on identifying a solution, on making things better, on how to improve things from here,  will.