@Ttc42nearly43 I am so sorry to hear that you are still struggling with your dad.
Of course your dad is grieving but he is also becoming a burden to you and he is making it so much harder for you to grieve your loss.
Does he have any support in place? Are there any teams you can reach out to?
I know you must feel so responsible for him but ultimately he is a grown up and you have your own family to look after.
It is such a difficult situation as of course, unless he wants to stop, you cannot force him to no matter how you try.
My best friends mum is a drinker, her dad died 5 years ago and her mum's drinking is now at staggering levels. My BF has had a lot of therapy but she has worked really hard to learn to live "alongside" her alcoholic parent.
She has some very strict boundaries in place - and it's taken her years to get there but its just things like she won't allow her mum in her home if she is drunk, she will end a phone call if her mum is drunk, she leaves her phone on silent overnight so will not be available for any overnight dramas.
I wish there was an easy answer and I am sorry you are dealing with this as well as losing your mum x