@Notamummsymum I’m very sorry for the loss of such an important person in your life. You’ve an absolute right to feel as you do. The loss of a grandparent is hard.
Your DH is very insensitive and I’m quite surprised you say he lost his DM five years ago as it would be easy to assume he hadn’t experienced the loss of someone close. Then again the ability to appreciate someone else’s position and their sense of loss is not built into only those who have had the experience.
My experience of bereavement when my 82 year old father died five years ago (as a result of delayed cancer treatment due to COVID) was that the most difficult to deal with reaction was the minimising:
“at least he was old, at least it wasn’t COVID, at least you’ve still got your mum, at least he didn’t suffer like so and so (how TF can you be sure of that?)”.
So my first rule of responding to someone’s grief is to respond just to them and not try and relate it to my own feelings, other people’s experiences etc - it’s not relevant. And never respond with ‘at least …’ And don’t ignore it altogether in the ultimate act of minimisation.
The other thing that I found difficult is having someone respond by trying to slot the loss into a position on some kind of Grief Hierarchy, e.g “you think you’re devastated about your dog, my friend lost her favorite uncle two weeks ago [and an uncle is 10 points, (but only 7 points if over 70), whereas your dog is only 3 points on the Allowable Grief Scale]. There was a lot of that during Covid with people questioning the value of treating old people - hard to hear when it’s your old person, so I can really appreciate how you feel about your DH’s comments. Over all it is the minimising of feelings that is very hard to take at a difficult time (even if it is well meant clumsiness, not sure if that’s the case with your DH).
Sorry for your loss of your Grandma. Look after yourself and take the time you need. 💐