I feel so bad and sad for my husband...

He was raised by his grandma at the age of 9 his mother let him move with his grandma and dad but his dad was hardly there. My parents call me daily and visit more than his family does. He told me he feels weird because he's not use to it because his family or parents don't visit or call. I feel so bad and sad that they aren't there or weren't there for him as a child and now. I know he's 20 now but I still feel that the parents should check up or visit atleast. We were in our other apartment for a year his mom only visited 3 times out of the year and his dad like 1. It low-key makes me mad that they are shitty like that to their own son I can never just abandon my son and never see how he's doing.