Crunches don't actually build flat abs. They're great for strength, but they aren't the magic ingredient for a nice, tight tummy. To see some abs pop through, you need to focus on burning body fat. So, focus on doing HIIT a once or twice week paired with your ab exercises. Once those muscles are built and there's a lower amount of body fat in the area, they will peak through!
Carbs aren't the problem, your relationship with them is. We hear it ALL THE TIME that carbs are the devil, look at everyone jumping on the keto diet!! We need carbs to give us energy! And not just to fuel your workouts, but just to live, work, and think. Did you know that vegetables are carbs, and so are healthy grains like oats and quinoa are also carbs. Its not just white bread, pizza or bagels. Try to focus on eating healthier carbs, you need them to function. Stick to the healthier carbs and avoid the not as healthy carbs like donuts on a regular basis.
SPOT REDUCTION DOES NOT EXIST. Your body carries more fat in some place than others. So you can focus all your time into doing squat, but it won't lean out your legs. Some parts of your body will lose fat before other places, some quicker than others. Just enjoy the journey, have fun, and you will get to your goals.
Cardio is not the answer to weight loss. It helps, a lot of people use it as a tool when they hit a plateau. But running for hours on end is not the answer to losing weight. Strength training with HIIT is what works wonders. You build muscle (which in turn helps you burn more calories during your day), and with HIIT, you burn body fat and its usually about a 15-25 minutes session which is PERFECT for those of us who absolutely HATE doing any cardio.
So with that being said, go lift some weights, be happy, do what you love, and enjoy the journey baby! You will hit your goals!