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I'm so satisfied with PM7. It tastes good and more importantly, it's inexpensive. You cannot just sit up there and say that it sucks, when you don't have the other important factors in bodybuilding in check. Supplements are just supplements; they should not be your main source of macros. Most of your macros should come from your diet. You should just exert more effort on watching what and how much you eat. Do you even have a food scale? If not, how do you count your calories? Do you have an idea how many calories there are in foods, i.e. chicken breast vs chicken thigh? There's a lot of addition and subtraction involved when you're monitoring your diet. Do you prepare your own food? That's just the diet part. You can work your ass out in the gym and not see results because your diet is way off.
Also, don't be comfortable at the gym. If you're comfortable, you're probably not building muscles. You have to do uncomfortable workouts and make your body adjust to it until you're comfortable again and then repeat the process. PROGRESSIVE OVERLOAD. When you spend so much time on your phone while working out, you're not working out right, I believe.
Belly and back fat is the first thing to come when you gain weight, and it's the last thing to go when you lose weight. That said, at the end of the day, the rule is simple: ABS are made in the kitchen. You have to be in caloric deficit in order to lose weight.
There's no direct workout that will make you lose belly fat. Spot reduction is a myth. You can see some advertisements for products that say otherwise, but that's just a scam. When you lose fat, you lose it from all over your body. You can do all the ab workout available out there, but if you do not lose the fat that covers it, you're never gonna see your ab muscles. You really need a consistent combination of regular, good workout and diet. (caloric deficit for cutting, caloric surplus for bulking).
Now, I'm wondering. If you have time to work out at home, why don't you just go to the gym?
I eat only two cups of rice a day and I'm still having a hard time getting the lower part of my abs to show, but I know I'm close. I just need to tweak my carb and calorie intake a bit, which is, of course, easier said than done. In your case, you're eating 4 cups of rice, simple carb. Those four cups alone are already around 840 calories. You might want to show us your current full diet plan before we can say where you're getting it wrong.
And you cannot just tell the person to just eat less, because somehow, you need to fit in the necessary macros: carb, fat, and protein. Cut too much carb and you might not have enough energy to do your workout. Cut too much protein and you might lose some hard-earned muscle. Cut too much fat and your hormone production's gonna take a hit.