My boyfriend said I ruin everything

My boyfriend said I'm no fun and I ruin everything. We went to his friends house and I thought it would just be me, his friend and his friends girlfriend. There was alcohol and we are all between 27 and 30. There were a lot more people than I thought but I didn't want to ruin his fun. I didn't get uncomfortable until they brought in teenager's. His friend and his friends girlfriend had talked to this teenage girl online and invited her over and asked her to bring friends. There were 3 teenage girls and 2 teenage boys. The youngest there was a boy who was 14. This was too much. I didn't understand why we were hanging out and giving drinks to a bunch of teenager's so I told my boyfriend this is too much and we are leaving now. He got so mad at me and I told him if he didn't take us home I will call an uber and he can find somewhere else to sleep tonight so we left. He sees nothing wrong with the whole situations. The oldest teen there was 16 and youngest 14. A lot of things were wrong with invited a bunch of kids and giving them alcohol. I told him what his friends did were weird and he just said I ruin everything and I'm no fun.