Dump Derek?

Bosses on US X-factor have told Cheryl to dumpr Derek and get a new fitness trainer. Whilst I agrre with the first order  I think telling her to get a new trainer is a bloody cheek. I don't think anyone could call Cheryl fat or unfit. If they don't like who she is dating and her figure and worry about her accent why the heck did they employ her in the first place?