“They can’t afford such bad PR which is relentless.
“We’re talking about the birthday video, The Bench book, the New York trip. A lot of people say, ‘you’re contributing to that’.
“I would say I’m just supporting the facts, a lot of these things were not successful.”
It comes as the pair have been accused of “confusing the public” with royal visits.
Harry and Meghan went to New York to attend the Global Citizen Live concert in Central Park at the end of September.
While in the city, the Duke and Duchess of Sussex also met with New York mayor Bill de Blasio and Governor Kathy Hochul.
Mr Sean has warned the couple of scheduling conflicts with the Royal Family if they were to travel to the same places.
“The problem a lot of people felt was in New York, people were confused.
“Was it a royal visit or wasn’t it?
“Simply because at the same time if Harry and Meghan choose to pop up and do their media blitz, people are really confused.
“If Harry and Meghan want to undertake these visits and host such high profile events, they must inform the palace in advance.”
The couple visited the city’s memorial for the September 11, 2001, attacks on the World Trade Center.
Source: EXPRESS CO UK