He describes going out for a spliff while everyone else is asleep when they were staying at Tyler Perry’s house.
I think this explains a lot. We have always known he had a history of drug use but the fact he is still (or until pretty recently) smoking cannabis, when we know that long term usage can cause paranoia, makes sense of his belief people in his family are briefing against him, his absolute conviction that all kinds of petty things in the past from his bedroom size to expressions on Kate’s face show deep hostility to Meghan and him.
I am not dismissing the fact that Meghan has been the victim of racism both inside and outside the family (Princess Michael’s brooch/ the worst stuff in the press and online) but Harry seems very ready to take it as representative of wider attitudes. I wonder if part of the problem has been that when Meghan has needed help navigating and translating an alien culture and family, the help he has given her has been reflective of his own paranoia and encouraged her to interpret things as hostile when they’re not meant that way.
The thing is given his history with the press and the racism that still exists they do have a lot to be paranoid about but what if his ‘everyone’s out to get us’ ageing stoner brain is stopping him keeping it in proportion?