does ur man/ woman like to thriw low blows during arguments?

Obviously in every relationship people argue but I REALLY HATE when it doesn't seem like they ever try to listen and get your point on things then they sit there and are super rude and say mean shit...this is gonna be long but please bare with me...for example my bf works nights I work days and he bitches sometimes about having to take care of the kids during the day especially now that my 8 yr old is on summer break because he doesn't get enough sleep. back story is he thinks my job is shitty and doesn't even want me to go back to it after my maternity leave (I'm due with our daughter within the next 2-3 weeks) so I told him I can just call off but that will take time out of my maternity leave and then I won't have as long with the baby and if i take more time then I may not have a job to go back too and he said he's just gonna call out I said no ill have my grandma watch them and he doesn't like her or my dad watching them so I was like ok well what do you expect me to do then cuz the kids aren't going to just stay in bed till 11am-12pm till you get up. so i told him I'll just quit my job but i really dont want to do that. he told me that I'm lazy and working a dead end job anyways cuz I sit on my ass all day cuz it's a desk job. first off I work at a corporate office granite it's only customer service but I dont think that's a bad job? I tried to explain I work this job because it pays more than my last job I don't think I'll work here forever it's not my dream job but sometimes it takes time to move up and get into better jobs, he also thinks I need to work a more physically demanding job and I told him my last job was physically demanding and I quit because that only paid $10/hr and I busted my ass now I'm making a easy $13/hr and I'm not in it to be active I do it for the money for my family. Then he sits there and tells me I'm just lazy and going to end up like my mom in another 20 years (my mom works in a deli at a grocery store part time, has no licsense, and no motivation for anything, and is a smoker) I said first off I'm NOTHING like her I have my licsense and a car, I have a better job, and I dont even smoke so I said he's a idiot and making no sense and talking out of his ass and being really rude and he didn't think he was he thought he was just being brutally honest. he told me he would rather me quit and go work for a temp agency cuz a temp agency git his sister into a good job making $17/hr but even she saud she was lucky she got into that and I told him that temp agecys are a hit and miss sometimes they can get you into somewhere great and sometimes they can't and that's a stupid idea. I told him he needs to stop downing me atleast I have a job...then another reason I got upset is cuz technically my 2 kids are not his they are from a prior rekationship and since my 8 yr old daughter has gotten older she's becoming more sassy and my son just hit 2 years old (terrible 2s) well he criticizes my parenting all the time he says I'm not hard enough on them and that just because I let my 2 yr old watch tv for 3hrs before we went and ran errands this morning ,and that when I spank them vs when he spanks them they cry when he does it and they don't with me so he says I'm letting them walk all over me and I'm not? I ground my daughter take tv away and took her tablet for good and spank when needed yet he doesn't see that I do discipline and he said it's my fault for the way that they act? I'm sorry last time I checked no kid is 100% perfect no matter if you discipline or not and they are just being kids. he gets mad cuz when he's sleeping through the day after he's off work were all obviously up and sometimes he gets livid cuz of course my 2 yr old occassionally cries and whines and he gets pissed cuz they gry loud and he starta saying I'm not doing my job? Idk how he's gonna expect it to be quiet with 3 kids especially a 2yr old and a newborn it's just not gonna happen but that doesnt mean I'm not doing my job...he just makes me feel like a shitty mom and makes me feel so down about myself sometimes and I hate it. I hate the low blows. he's said much ruder things in past arguments and even though I'm about to give birth to HIS daughter in less than 2 weeks he always says he's gonna pack his shit and leave. then this morning I try to be nice and I got McDonald's breakfast for me n my daughter but he's bitched about how he hates their eggs and prefers jack in the box so to be nice I went out of my way and went through both places instead of saying awe thank you babe tbats sweet you didn't have to do that he bitched me out and said I'm stupid for going through 2 places and just should have gotten him something at mcdonalds...well there goes me trying to be nice. it's like I can't win with him I love him so much but why do they have to be such jerks sometimes. Rant over ,but does anyone else have their SO throw low blows and be super rude during arguments too? how do you feel about it?