Have you been reading John Hemming by any chance? Because there is a lot of emotive but not very fact based stuff written about "forced adoption" in the UK.
The UK's system isn't perfect but honestly I think it is the best of a bad bunch. Whichever way you look at it there is no neat and tidy solution for children who are unable to stay with their birth parents, obviously the ideal situation is that birth parents sort out the problems that make them unable to care for their children and become able - but how often does this happen? If they were able to sort these issues out most people would do so - nobody wants to lose a child. There is perhaps an argument that there could be better communication and support offered to parents (the kinds of parents who have unsolvable problems are often responding to trauma of their own) but this is very costly and of limited benefit - sometimes to do better overall in a system you have to put the resources you have to use where they will be most effective, even though that leaves some people behind.
It is very rare in the UK for parents to give up a child at birth - thanks to decent availability and low stigmatisation of abortion, low stigmatisation of single mothers, availability of welfare benefits, etc. So most of the children coming into care are victims of abuse or neglect. Every day they stay in an abusive or neglectful environment adds to the damage caused as a result of this, so unless the parents are able to sort the situation out, it is better for them to be removed as soon as possible. But nobody has a crystal ball and it is not fair or possible to decide early on which parents are likely to sort a situation out.
Where children can't stay with their birth parents the ideal solution is for them to have a stable and permanent home with another family - adoption. If this isn't possible long term foster care - but this has the issues of the meetings as discussed and constant risk that the child will be moved on. A succession of foster placements or institutional care are damaging to children - perhaps not as damaging as abuse or neglect but they cause further trauma. This should not be the solution. Remember traumatised children can become abusive adults themselves - the aim ought to be to minimise trauma.
There are problems in every case. It's a balance of trying to take children out of a damaging environment before too much damage is done (e.g. Peter Connelly, Daniel Pelka), but giving parents enough time and support to turn things around, as losing a parent/family is also traumatic, and at the same time not leaving children in limbo (institutions, foster placements). There is NO solution which does not cause harm, but I do think the UK's framework is set up to cause the least harm possible. Where it fails is generally down to lack of funding and resources. Too many changes of social worker, social services having too many case files and overlooking details, people making bad judgement calls (in theory should not happen as so many people look over each case, but obviously can).