The point I think is they are not actually saying anything - they just insinuate
Someone said something racist about their child - who? What was said? What's the context?
My brother screamed at me - what did he say and what was the context?
Stories are planted - which stories specifically? What's your evidence?
The palace defend other royals but not us - give examples, which instances did you request/expect a statement to be issued about (unless he means everything which is just infeasible)
Also, the family have made no effort to reconcile - so the participation at Philips funeral, the jubilee, the queens passing and funeral, inclusion in Charles' first speech as monarch was all what?