I've posted before about my parents. They just don't enjoy seeing DD who is their only grandchild.
My father in particular is very set in his ways. He's 72 and a pessimistic person who isn't interested in small children and didn't enjoy/want his own (he's told me this several times over the years).
They used to do childcare one day a week when I was working but agreed to stop mutually as they found it difficult, which is fine.
I didn't see them during lockdown obviously, and I've just started to take DD there on a Friday afternoon, for 3-4 hours. Last week DD was getting out some tealight candles from a cupboard (they don't have locks on their cupboard) she wasn't doing any harm as she just likes arranging/counting things. My dad was getting stressed that she was making a mess and told her to stop, when she protested that she was just playing he shouted loudly at her to shut up and said she should do what she was told. DD got upset and so sat with my mum playing with a sticker book...my dad started complaining and getting annoyed that she was creasing the pages!! 
DD is 3.4 for context.
I feel like I shouldn't take DD to their house anymore, it's too stressful and I don't want her to go where she is not wanted.
DD can be a fiesty girl, I'm biased obviously but she's interesting at this age and a joy to be with.
Friends parents seem to dote on their grandchildren, mine can't seem to enjoy seeing theirs for a few hours a week.
Am I unreasonable, is it them...or somewhere in the middle?
It's sad as they are my parents and I love them. I wish they were a little more tolerant.