The constant need to perfect your design, constant doubt, is it good, will it work, is my idea reflected in my work, is my design wearable, is it unique, special? The designer and their immediate environment suffer from these moments of doubt and self-criticism.
There is never a moment of euphoria. Melancholic, depressing, nothing is ever good enough, never being satisfied.
The designer dismisses themselves, indiscriminately rejects designs; nothing is ever good enough; they become dictatorial; people cringe in fear and run away, fearful but wanting to do things right.
It is a dark period, full of self-criticism.