Easier to be a single parent than the emotional roller coaster?

Not thinking that my marriage is going to last much longer with my husband who is constantly taking us on an emotional roller coaster and calling me names (feel like I have too much respect for myself to tolerate someone who thinks his wife ever deserves to be called a bitch)... Even my therapist can't understand his behavior sometimes. We have 2 young children who need a lot of energy and attention. Is it easier to be a single parent co-parenting than deal with the emotional roller coaster living with someone like him brings? Never thought I'd ever be in this situation of contemplating divorce - I guess no one goes into marriage thinking that, just feel embarrassed that I married someone who treats me like this (didn't happen before kids). Just had a fight and I'm feeling with disbelief over his behavior and language. He refuses to do marriage counseling, and I wonder, even with that, whether he would ever change. Can marriage counseling change people's belief that they can call their spouse names and feel justified doing so??