Why is it so fucking hard?!

Okay so I'm slightly ranting here but SHIT. So my fiancé literally needs to grow the f up. We recently had a baby, she's three weeks old today, and he's just doing nothing but complain! He has no friends, he can't play video games, he's tired. I'm the one constantly taking care of the baby! All day when he's working his shitty job and all night so he can sleep. But I ask him to get a better job and I GOT HIM ONE THAT HE WONT TAKE CAUSE ITS HARD WORK but I'm the ass controlling his life and he has no say in it. So I just fucking gave up. Like whatever he has to get a better job and I'm giving him until October 1st to get one or else he has to take the job I got him (he'd start on October 2). If he won't I'm done. Like why is it so hard to man the fuck up and take care of your daughter?! Am I wrong or what??