....Also, some body shapes need less bolstering than others. No manufacturer makes a single seat that fits all. American makers have, traditionally, tried to fit everyone with wide, flat seats (recognizing that Americans often look like this):
Even baggy shirts can't cover up this.
Buy the car that fits. Or, better yet, if you're too wide for the CX-5 seats do a major life turn about and make a goal to hit your most healthy weight. It only takes most people about a year to do it, two years if really obese. The benefits are astounding. The craving for more and more food is usually caused by being under-nourished. The body is often craving nutrients, not calories. By quitting processed foods and sodas with little nutritional value (often sweetened with high fructose corn syrup) and eating more nutritious whole foods the body will gradually stop craving more and more calories (when it obviously doesn't need them). And stop driving your car when you are only going two-four blocks! Walking is almost as fast.