This type of ad copy would almost certainly get disapproved by Facebook and you’d be back to the drawing board.
Why?
This copy hits WAY too hard on people’s pain points.
If you were struggling to lose weight and feeling bad about it, how would you like to be reminded of that every time you get on Facebook?
Basically, this ad copy is implying that the reader is fat and out of shape and helpless to do anything about it themselves.
Facebook doesn’t want their users to have this experience of feeling bad about themselves after they read ads. Facebook wants people to have a great experience with all aspects of the platform so they’ll keep coming back and spending time there.
So, they try to build their ad policy around protecting their users from feeling triggered and crappy after they see ads on Facebook.
So, what should you do instead?
Write copy for your ad that is benefit-drive, positive and inspiring.
Something like this would be a much more effective Facebook ad.