I love it when people say shit like "Dude you're cutting too much, only do a 250kcal deficit!"
Where the fuck do you think a deficit 1kg/2,2lbs cut per month will get you if you have to lose 15kg/30lbs?
Why do you think advanced bodybuilders start their cut 24 week/6months before the show? And these guys start at 20% or 18% bodyfat.
Cutting is never easy and doesn't suppose to be, anybody that tells you otherwise is lying to you.