What is wrong with a crying fit??? Isn't it inevitable in some challenging life situations? Raging also?

There is nothing wrong with crying, but crying needs to lead to resolution.

What happens for me in meltdown isn't crying but complete dissociation. Only under extreme pressure these days, I clock out and spiral into the emotional pit. Perhaps how we express the emotional pit is different between people - for TishaBuv it was hysterical crying, for me it was isolating and being frozen.
Yet self hatred seems to be the end result for both of us.

My friend wrote to me: . we go into this survival mode too and the more we do that, the harder it is to connect and find ourselves again. so allow yourself to heal. and be. in the moment.

TishaBuv says : We can learn (with therapy?) to not fall down the abyss of emotion to debilitation. This is a work in progress.

I think that's different to the sort of crying that you are posting about @sarahsweets. Perhaps for me it's when I suppress the possibility of normal crying or raging that I go into this unhealthy spiral state of "debilitation".