He sounds really hard work in that case.
Looking back on my now dead family members, I realised with sadness that I can't remember one person I loved ever laughing out loud at finding something funny. I'm sure being a teenager in the war, with parents caring for a grandparent with dementia, scarred that person for life.
Unfortunately, however hard you try, you can never change this sort of thing, but it's really difficult trying to maintain your own happiness under these circumstances.