Pomegranate fruits get ripped at only the size of a lime citrus with crack open area. Also has black dots all around, I see pomegranates at Supermarkets 5 times bigger in diameter. Why?
The black spots could be cercospora spot disease. This article has more information: http://www.krishisewa.com/cms/disease-management/398-pomegranate-diseases.html
Water stress can cause rind split in young citrus; perhaps its the same with pomegranate. Also, you're plant may not be old enough to fruit well, or it may be a variety that doesn't fruit well. Here's some more information: https://www.gardeningknowhow.com/edible/fruits/pomegranate/growing-pomegranate-tree-seeds.htm