Asshole husband 😡😡😡

I've been with my husband for 5 years, we have a 4 year old daughter and a 6 week old son. Ever since our sons been born he hasn't been around. He works during the day which is no big deal but when he gets off work around 5-6 he goes to hang out with his moms boyfriend then doesn't come home til 9-10 at night... and I'm acting crazy cause I call and bitch him out... wtf?!? I'm a single parent, at least that's how I feel.