You’d just be drawing more attention to yourself… Or inviting a challenge
Do it the German way and just trauma dump. I mean if they didn’t care they shouldn’t have asked.
In Germany “how are you” is also smalltalk but you are not expected to lie. Just keep it short.
“Wie geht’s?”
“Nicht so gut gerade und bei dir?”
You don’t think people would go “aww how come you are down? Let me cheer you up”?
It’s worth realizing some people do not want to be cheered up. My understanding is the misery, for lack of a better word, is more comforting to many as it reminds them of when they were young (or they emulate what they saw around them as children)