Mom shaming?

Renee

So I posted on Facebook about my 12 year old little sister has been misbehaving this week. I'm 35, I have been helping my parents raise this child since she was a baby. Her biological mother is a POS who left the baby with my family and didn't come back. Here is a comment from that post and if I'm reading it right it sounds like this person is mom shaming a parent who she doesn't know. Nor does this person knows the situation.

Before my little sister was born my mom had 2 minor heart attacks, and has had other health issues over the years. So has my stepdad and I have been helping my parents with the child since I was 23.