My partner doesn't have a good relationship with our kids and I don't know what to do about it

Let me start by acknowledging my partner and I have huge relationship issues and they are being dealt with (by probably splitting up soon).He is a pretty mediocre dad and that has led to a poor relationship between him and at least our older child (younger is still too young to have much of an opinion). Our daughter does not seem to enjoy spending time with him, doesn't notice he's gone when he travels, doesn't go to him for comfort etc.He isn't mean, he's just selfish and indifferent toward her. If she's watching a TV show he'll come home from work and change it to something he wants to watch without a word. When he's home he's just totally oblivious to her existence unless I specifically instruct him to take her to gymnastics class or something like that. Doesn't play with her, talk to her, help her get things she needs, etc.He wanted to have kids and would tell anyone that he loves being a dad. But he loves it for like...5 minutes a day.He has never put her to bed, never spent a day with her alone (calls his mom if I can't be here), and when he does have to watch her for a few hours he just puts on the TV and plays video games in another room.So all of this has led to her rejecting him pretty harshly. Now when he does offer to take her somewhere or do something together, she explicitly says she doesn't want him and she wants me or her grandma to do it.Is there anything that can be done about this or is this just how their relationship is going to be? via /r/Parenting http://ift.tt/2omAY2g