For those who are unable to exercise (I have ME so exercise literally makes me ill), it is possible to lose weight. I did it by shrinking my portions, allowing myself to feel hungry, sticking to 3 meals a day with no snacks except very rarely. I eat different foods every day. Nothing is banned but if I have a carb heavy meal I'll have a lower carb next meal. No calorie counting. Plenty of water to drink. No alcohol.
Don't give up. I didn't buy expensive shakes or pills. I just reduced my food intake.