Adoption informed people do not use language like "ungrateful" to describe adoptees, and they are aware of the myriad of ways that children end up in foster care/adoption. You are blithely unaware that many "abandoned" children had parents who were coerced into putting them in care, or had parents who were "undesirable" in some way. You don't care about our issues regarding loss and identity, even if the adoption happened under the best of circumstances. Again, it is best for you to sit this one out until/unless you become informed about adoption, because you are not as informed as you think you are.