I haven’t read every post here , but I see some criticism of the OP for expecting her H’s family to travel to see them once in awhile.
OP - I totally get it. There is a particular dynamic when there is one family member who is “the one who left”. This is H in his family. We have never lived within 700 miles of them, but we have always made a big effort to travel to see them. Not so big of a deal when we were first married and it was the only travel we could afford, but times have changed. I admit that MIL and my late FIL traveled to see us twice a year which was lovely. H’s sisters however, do not. Yes I get that “they have lives”, but guess what? So do we. In fact all of their now grown children attended local colleges and now live very close to them. OTOH , our oldest attended college in another state and still lives in that city. Our younger child attended a school 10 hours away and and now attends a college overseas. H and I both have careers and limited vacation time. My folks live near H’s family, but spend part time in Florida. I am close to my sister who lives in New England (we are in NoVA), etc. so yeah we have a lot of other places to go.
That said, we did talk H’s sisters into coming to see us once and they had a great time. One of them has been back once or twice (I am talking over 36 years).
So yes, I see where the OP is disappointed in her H’s family never making an effort to visit.