Bd ignoring me

I’m not with my baby’s dad and he’s got 2 other kids previous to ours he’s a good dad to them but to our 6 month baby he’s never there for. He only wants him like once a month and it’s whenever he wants not when I ask. He use to buy him wipes and diapers only but now he won’t even buy him that. He ignores me all the time when he has my child and I ask how he’s doing. He also ignores me when I ask for anything for baby and will just hit me up when he feels like it I’m done trying to get him to be a good dad to our kid it’s so frustrating I filed for child support but he’s been avoiding it so idk what to do now I blocked him and I’m just done with him . He’s always rubbing it in my face how much he does for the other kids and does nothing for mine it’s annoying. He’s on child support for the other kids as well but he also buys them things and they take to their moms house which I don’t care but it’s like why can’t you do that for the son u wanted so bad. I’ve tried so many times to coparent but it’s not working when he doesn’t want to be a parent he always threatens me to take me to court for joint custody but never does I am just going to cut him off and out my sons life because if he wants to he will right? I’m just tired of bs after bs and the lies and I’m hurt 😞 now I have to raise my son alone meanwhile he’s being a good dad to his other kids like my baby’s innocent idk it’s just hurtful i just feel sadness ☹️