Is this normal

My fiance constantly degrades me about finances. He says im irresponsible, but i pay all the bills. & my bills, besides the rent we split. i pay daycare , groceries , electric internet. He only pays for his bills and groceries if we are literally completely out. he gets mad if i cant pay a bill , but i am paying alot. most od the time when he gets angry he ends up attacking my character. I feel terrible about myself and keep being met with lows. The highs are good , but the lows just feel so low. He gets mad because i dont communicate but everytime i ask for help he usually tells me no. We have a son together and he tells me my son doesnt like me because we argue since he prefers him but hes only two. hes threatened multiple times to get him taken from me and that he can prove im not fit to be parent. i have tried to talk to him and ask him to not talk to me they way he does or make comments about my characted but somehow we always end up there. i cannot lie , im not the best witch my money and i have made some financial mistakes. But we arent married and i feel like he should be able to help more than he does especially because he works more than i do. I feel like maybe im crazy or soemthing because he also tells me that. He even throws things with my ex boyfriend in my face because that was something i had confided in him about. I just feel like idk what ro make of this. Am i really a problem or am i victim ?