I mean, people vent their opinions and that may trigger any of us. Sorry you felt this way.
Unlike a lot of people here, I was raised with love and don't have issues with my (core) family; so threads like "your parents raped, killed and stole you XD" make me actually start a suicidal protocol/psychotic attempt. But I can't change people's mind - neither their trauma. Someone I love dearly is the proof how parents can be evil, I can't blame users who hate parenting and families (though, yeah, they could at least stop generalizing).
What I can and indeed do is mute the thread to avoid... you know, triggering. But I'm sorry for your trigger. Please, forgive me if I, somehow, hurt you.