Confusing relationship..

So I have a fiancé. We have a daughter together m, he works full time and I’m a stay at home mom. We have a good relationship and we’re happy together but our arguments are so bad that it makes me not want to be with him anymore. He has a drinking problem and I don’t drink alcohol whatsoever so when he’s a drunk mess and is being very rude it makes me not want to be with him st all!! We have really good time tohether but also have horrible the worst arguments idk..