Others may have been reacting to that as well as it's not a productive addition to the discussion. (Also why I was snarky in my reply, which I will not be editing.)
Frankly, I now wish I hadn’t.
If you actually get triggered by seeing “happy families”, that’s absolutely a serious mental illness, and not only is it not anyone else’s concern, but by advertising it, you almost certainly are reinforcing it.
Being unwell is not something to celebrate or wallow in, and the creation of spaces that encourage such self-destructive antisocial behavior — tumblr comes to mind — has been to the detriment of society at large.
I also mention my Multiple Sclerosis when it's relevant. Is discussing my spasticity 'wallowing' in it?
Why is your first instinct to shame the suffering person for talking about it? We shouldn't celebrate it, but nor should we ban any discussion of it socially because it makes you uncomfortable. I'm sorry that you clearly have emotional reactions to frank discussions of mental illness; are you in therapy for that?
And again, work on your reading comprehension. I'm arguing against trigger warning culture because even if I take its assertions at face value, it doesn't help the people it purports to help. It's a refutation of the argument that 'trigger warnings help people with PTSD'. I have PTSD, which is relevant to refuting that argument. That's why I mentioned it.