Those 5 schools were not good enough for any child with autism and if the other parents who have children with SEN there aren't continuously lied to about provision and level of support they would have removed their children too.
DS is in a 6th school. It is excellent. Not perfect, but I have no reason to remove him for the sake of his mental health and self-esteem, nor for fabrications or cover-ups by teachers. Sadly, they are my expectations.
Still think they are too high?