My Dad and his partner moved away 2 years ago, previously really good relationship, used to look after DS1 one day a week for us when he was a baby/toddler. They came into a little bit of inheritance money and wanted to own a home outright (longterm renters, had previously both owned homes with ex partners, but didn't have the money to do it again) especially as they're both within 5 years or so from retirement. We live in the South East and there was no chance of them owning a home down here mortgage free and after a few months of searching got a little impatient and ended up purchasing a property 3.5 hours away because they couldn't find anything closer apparently.
Since then the relationship has been tricky, I've had another baby which they've only met 3 times (he's 8 months), DS1 doesn't really remember them and hates speaking to them on FaceTime (he's 4), and it's just a little difficult to stay in contact regularly. They often say how much they miss us via text or brief call but seem to be enjoying their life up there.
DH really blames them and says that they jumped into it, they've made their bed, they clearly don't want a relationship with DC's. They were back down south for a wedding tomorrow and we went for lunch today, then they came back to ours for an hour before going off to meet a few friends that they never see, he was really p*ssed off that they hadn't scheduled more time with us and DC's and that a nice pub is a terrible place for us to take 2 kids... He was even more annoyed that I offered to drive them to where they were meeting friends so my Dad could have a drink and I stayed for one with them and their friends who I've known since I was a kid. I was back in time for bedtime for DC's and was probably only gone just over an hour. I said I wanted to spend a little more time with them if I could but the car wouldn't fit all of us.
AIBU for being upset with him for constantly putting a downer on the relationship with them, or is he right, should I expect more of them? We have a great relationship with both my mum/stepdad as well as both his parents and see them regularly but they all live within 45 minutes of us just FYI.