@Foxsakemum
I'm so very sorry you are going through so many difficult things at once. You must be devastated at the loss of your lovely-sounding, wise mother, having to cope with all the funeral arrangements, etc (hard enough a task without anything else - I've been through that), everyday life, your daughter and now an unsupportive, sulky man.
What you are going through is hard enough without a selfish "partner" without the emotional intelligence to at least pretend to do the right thing.
I see you've decided you can no longer put up with this situation and you are absolutely right. Also importantly, your mother saw right through him and SHE, bless her, was SO right.
She was also right in saying:
"life is too short to be miserable"
Listen to the wise advice and, as soon as the time is right, make a happier future for yourself and your child.
Take strength from your siblings and friends IRL to get the support you need and there's always us to talk to whenever you need.
You have some tough days to face but you can DO this. Take care my dear. 🌷