His most recent landlord also accused him of failing to pay rent and trashing his rental property, which resulted in his lease being cancelled.
"This is the lowest point of my life," he told the publication.
"And it’s all because my life suddenly got catapulted into the spotlight – through no fault of my own.
"My every move has been put under the microscope – not just for me but all my family," he said, despite his family partaking in numerous interviews slamming his sister, who was famous long before meeting Prince Harry.
"Now there’s been so much said about me – both true and untrue – no one wants to lease me a house or give me a job.
"It’s tough to accept – especially when I never asked for any this."
Thomas said he wished his sister well with her first child, Archie Harrison, but hinted that she could have given him money, instead of celebrating her pregnancy with a lavish baby shower.
"The problem is I’m known as Thomas Markle, Meghan’s crazy brother now.
"I wish her all the best with her new baby but it is hard when I see how much she’s spending on baby showers and things and I’ve got nothing."
To make ends meet, Thomas is taking part in a celebrity boxing match, and hopes Meghan will tune in from her Frogmore Cottage home.
"I hope it shows Meghan that she does have a family here that she may have forgotten about and that it hasn’t been easy for any of us having our lives turned upside down," he told The Sun.
"People think I’m riding Meghan’s coat-tails but that’s the hand I’ve been dealt.
"This is my life now – I can’t live my old life anymore even if I want to but I still need to survive."
WATCH: THOMAS MARKLE JR SLAMS HIS OTHER SISTER