Miracle -I hope that most adoptive parents woudl be smart enough to realise that not everything is as black and white as it can look in SWs reports.
They are not written to get a true and balanced picture of all the complexities of life for the birth family. They are written for one purpose, to persuade the courts to follow the SW recommendations. They often contain many serious factual errors, as well as opinions disguised as fact
Also they are only a snap shot at that time . Of course, that is the crucial time for that child, as their life can't be put on hold while adult problems are sorted out .
obviously many birth parents do manage to sort their lives out, and go on to have new and happy relathioships and successfully parent subsequent children . Sadly of course some don't and go on to lose more children to the system. And it's hard for children, with their black and white thinking, to understand that 
I hope many adopters are honest enough to realise that if they and been in your situation, at your age, facing your problems , with your coping skills, with your support system, they might have struggled too.
Most adults have at some time been in a bad relathionship, , or they have seen a close family member or friends struggle in one . Same with addictions and mental health problems.
I hope they woudl communicate their child's story to them with love and empathy, understanding that we are all flawed people and we all make mistakes . At the end of the day, if you say harsh and judgemental things about your child's biological parents, you will hurt your child too.
A little empathy goes a long way