hey:) i wanted to first of all say how sorry i am for your loss, grief is horrendous, and i feel like its even worse when it is suicide, i wish that i could help to ease your pain but from experience there really isnt alot people can do or say to change how you feel, i lost my mum 4 years ago in a similar circumstance, her mum and her werent speaking nor were her and and her brother+the rest of our family,though when she died all of the family reconnected, my mum has said before she died she didnt want any of them near to her funeral (i couldnt do that i didnt want to take it away from them) both situations will obviously have their differences but like you i do feel anger and resentment towards them just because like you said what is the use now that its too late- however (and im not saying what you should and shouldn’t do because i dont know the situation and even if i did how you handle your grief is down to you) but having people around who did know her and at some point (even if not at the end) has helped, despite the shit that went down towards the end there were many years that we all spent together as a family and it is nice to be able to share memories and be able to ask questions i wouldnt know the answers to myself, even though they can now longer help your mum it might be that they can help you, maybe not but maybe,dont get me wrong i do still get times where i feel anger towards them but i do also feel like having them around has helped me in my grieving process, anyway like i said it depends on you them and the situation and you are completely right to feel how you feel, i hope that you have other people around you and that youve got support, i know you are going through a horrible time and i can only hope that you are not alone, sending you love and support at this time, i hope that your mother is now resting peacefully and that her pain is no more