I didn't see the thread OP and I'm sorry it's upset you.
I don't know anything about the payment foster carers receive, other than the multiple adverts that I regularly see popping up which suggests that you get £400+ for a child. I don't know why you only receive £200, but if other people have seen the same adverts as me, that would explain why they think you receive a lot more. Example attached.
Historically, I've had professional contact with foster carers. Unfortunately, not all of them fostered children for altruistic reasons, and not all of them provided a loving home. Like all walks of life, there are good, bad, and mediocre foster carers. I think it's wrong, and potentially dangerous to automatically label every foster carer as an "angel".
I have to say though, damaged children? Yikes. That's not the nicest phrase to use about an actual person.
I don't know you, but ignoring the reference to damaged children, you sound like a good person. I think the fact you've adopted five of your children and three are still with you in their 20s speaks volumes.
So please don't take criticism to heart. It's always the case of a few bad apples spoiling the barrel and when you're offering people payment in return for housing children, it may well attract the people who have the wrong motives - and when there's a dire shortage of foster carers, perhaps those doing the vetting aren't as choosy as they might perhaps prefer.
Some criticisms of foster carers are valid, unfortunately. That doesn't mean there aren't plenty of others out there doing an amazing job.