Standing back, looking at the Harry situation, I can't help thinking that Charles is the root of all the family toxicity.
He had an affair while married to Diana, which led to their divorce and much unhappiness on her side. After her early death, his children were obviously in a lot of pain. The remote parenting style of the RF probably did little to soften this.
He's managed to marry his affair partner and now he's cutting off one of his sons.
Harry just looks like a really hurt person acting out to me. In most families, they would just be tolerated and forgiven.
I think the RF look very cold.