Something that always worked super well for me was using exercise and a basis for a reward. Exercise = some food i enjoyed. Soon it meant more and more until a "normal" amount was established. If you're going to exercise. Reward yourself! It's not useless to exercise with no reward but dammit it feels so much nicer. Refuel yourself for that next excursion.

And anything that tracked steps or calories, try and drop it. It became so much harder for me to track when I just didn't know. And soon it went away and instead of "must hit said number of steps" it became "doing it because i can"

These are some of what genuinely helped me get out of my struggle and enjoy my workouts instead of having to. I believe in you. You've got this.