She Doesn't have mental health issues.

First of all, 'gaslighting' is a term being overused in the media over recent years to mean anyone who lies. Like many words these days, their meanings are being watered down by their misuse (like the word 'meme') (eg. Trump isn't a gaslighter, he is a liar - a single individual cannot gaslight a mass of individuals, it works the other way around.) Calling someone who has been unfairly or badly treated by others "mentally ill" is just another form of gaslighting. Because basically that is the main intent of gaslighting is to cause the victim to question their own sanity and convince others that the victim is insane. It's usually used against witnesses and whistleblowers hence the name 'gaslighting' meaning where victims are interrogated and sleep deprived for hours under a dim gas light.
Meghan has simply been treated badly and unfairly. I mean look what a nutcase her father and the white side of her family is. Look at the drooling slobbering masses of posters on this site that are jealous of her. Look how they are. Their posts are vitriolic and full of misplaced hatred. And of course there is the British tabloid press. Meghan isn't mentally ill because "she didn't want to live any longer". She didn't want to live any longer because she has been unfairly and poorly treated. You're all a disgusting mess of howling, whooping, slobbering, mobbing chimpanzees.
As Mark Twain said, "That's what a mob is"
"The pitifulest thing out there is a mob; that's what they are -- a mob; they don't fight with courage that's born in them, but with courage that's borrowed from their mass."
- Mark Twain