FWIW, putting my professional hat on, I think this interview was booked well before the outcome of the court case was known and had a specific PR objective behind it: to socialise and get the public more amenable to a reconciliation between the Sussexes and the RF.
I think this because there are a number of phrases Harry repeats throughout the interview which in my view have clearly been scripted by someone else and sent to him as a mini script: the half dozen references to 'reconciliation', the multiple comments about how much he loves 'my country' / 'the UK'.
My theory is also bolstered by the rumour doing the rounds in the industry that the Sussexes have a cash flow problem which is now becoming rather urgent.
So that was the strategy. But unfortunately, Harry, because he's not very bright (and perhaps also due to the shock of the ruling) couldn't stick to the script, and insisted on rehearsing his tired old paranoid complaints, along with a new and alarmingly Stalin-esque desire for some sort of 'Truth & Reconciliation' detente.
In Harry's mind, this 'Truth & Reconciliation' event would seem to involve his family prostrating themselves and begging his forgiveness, before listening avidly as Harry, the Prince of Truth, schools them in the ways of righteousness.
I personally find it hard to comprehend the level of obtuseness on show here. Harry is Church of England and so should, I assume, be familiar with the core Christian (and then, western democratic) idea that reconciliation can only happen if BOTH sides acknowledge their faults, show humility, and forgive EACH OTHER. It's not all one way, with the agent of truth on one side and the benighted bigots on the other. That way lies permanent resentment and permanent conflict.
TLDR: the interview was planned, and Harry screwed it up. Quelle surprise.