You don't have to deprive yourself to lose weight.
A diet of deprivation is starvation! Stop defining goals on can't. Good things don't grow from seeds of negativity.
Instead, work on switching worse habits with better habits. It's not about perfection, it's about progression. Make a discipline of continual improvement.
You can't solve problems with the same level of thinking that caused them. Switch up a few variables and discover a new solution.
Take the wheel and explore until you find something that works, then worry about upgrading your autopilot.
Though we be products of our environment, we have the ability to create our own environment. We have the ability to change. Try immersing yourself where you want to be. At least try to immerse yourself at the halfway point.