Any business that treated Meghan like the royals did would face an HR catastrophe, says a co-author of the controversial book about her.
Omid Scobie said: “It’s something we’ve definitely seen over the decades... women being married into the royal family and leaving scarred.
“If this were a business I’d really be investigating, perhaps by human resources, how this happened over and over again.”
He claimed Meghan and Harry repeatedly and fruitlessly asked for support to remain full-time royals.
In a podcast, he accused the family of not being concerned enough about their mental health.
Brit Scobie, who wrote Finding Freedom with US royal reporter Carolyn Durand, said: “Many of those times it fell on deaf ears or it didn’t seem to be taken seriously enough.”
Meghan and Harry have denied co-operating with the authors.
A royal spokesman did not comment.
It comes as her husband the Duke of Sussex accused social media giants of stoking a "crisis of hate" and called on advertisers to use their spending power to transform the industry.
Writing for US-based business magazine Fast Company earlier this week, the duke outlined his and his wife Meghan's efforts to help the Stop Hate for Profit campaign.
He revealed they had personally been calling on heads of major corporations, asking them to suspend their advertising revenue from social media sites that fail to tackle hate speech.
Harry said their message to them was to reconsider supporting platforms that have "contributed to, stoked and created the conditions for a crisis of hate, a crisis of health and a crisis of truth".
The Stop Hate for Profit campaign, which was spearheaded by a number of NGOs, saw companies withhold a total of seven billion dollars (£5.4 billion) in advertising revenue from internet sites over the month of July.
The duke said that social media had turned its users into its product.
"Every time you click, they learn more about you. Our information, private data and unknown habits are traded on for advertising space and dollars," he wrote.
He called on tech companies to "remodel the architecture of our online community" to ensure it is defined by compassion, truth and inclusiveness rather than hate and fearmongering.
