USCIS: Stop Family Separation!

I work out at a fitness center that specializes in fitness boxing. Punch, the name of the gym, was founded by Adelino Da Costa and his brother, who are both world wide boxing champions, and native to African country Guinea-Bissau. Adelino Da Costa's brother, who would like to remain anonymous, has a Permanent Resident Card, and has two daughters, a son, and a wife. He lives in America, while his family lives in his home country. He has become successful, and everyday he sends them money, and tries to help them obtain a citizenship or a visa. For the last 3 years he has been trying to bring them over to the United States, but every time they are rejected. I understand the United States has many immigration policies, but many families have been separated because of our flaws. This is not right, if there are families at stake, they should be able to receive a visa.