The 'unsavoury truths' as you put it was based around an accusation of racism that, when stated, tarnished the whole family because they refused to identify the individual.
That was wrong on every level. You know that.
Andrew? Yes, he needs to talk to the FBI, he has questions to answer but that is about Andrew and that is a separate issue to the Markles who lied in the interview, are using their titles to open doors, even though they want to do things their way and acted pretty fucking shabbily as his 99 year old grandfather lay in hospital dying.
It's not about attacking them, they have come under scrutiny after that interview and they have been found wanting.
Mentally troubled? I'd run with that as far as Harry is concerned but not her, not a fucking chance.