Must he be such a moron??Why do i stay??

So ok journal,
Needed a new splitter for CABLE,not PHONE,Cable,is it really that hard to get,STBX picks it up,but picks up the wrong one,he says i told him a phone splitter......I said no a coaxiel cable splitter for internet and phone.
Then he starts getting mad because god forbid HE WAS WRONG.
I have told him more than once turn off your radio when talking on the cell,so maybe you can hear what i said.By this time we are yelling,he says dont yell at me its your fault....I said Really my fault that you didnt pay attn the 1st 8 times I told you about the splitter,why is that i said hmmmm maybe because you only hear what you wanna hear...... I told him to get out of my face,and dont talk to me for the rest of the night,i dont wanna hear his boo hoo stories about work or anything else.....
He is such a moron,total jack ass .
Cannot wait for this marriage to be over IT SUCKS!!!!