We tend to be our own worst critic, so here's a suggestion: when you're going through a mental wellness low, treat yourself how you would treat a friend if they were going through the same thing!!
practice self compassion




You can even keep a little journal where you talk about about what went wrong that day, but looking at it in a kind and self compassionate way
for example instead of saying "i missed a deadline i'm such an idiot", say "i had a lot on my plate so this one slipped my mind, i can prevent this from happening again by setting a reminder/ asking a friend to remind me/ doing it earlier/etc."