My bf gets offended when I don't get off

So my boyfriend and I have been having sex for about 7 months and ive probably gotten off from penetration alone 3 times. He used to go down on me a lot but recently hasn't seemed to want to put the effort in. So we'll have sex and then I'll use a toy to finish myself while he kisses me or whatever. Recently he has voiced that it bothers him that he can't get me off and I've tried explaining to him that women's bodies are complicated and take effort. I told him he needs to "warm me up" in order for it to be pleasurable for me and he says that sometimes he just wants a quickie, which is understandable, but I told him if that's the case then he can't get mad at me for using my toy if he doesn't want to be fair and take the time to make it enjoyable for me. I asked him if he ever had this problem with his ex and he said no so I understand why he thinks it's his fault that I can't get off. How can I explain the complication of a woman's G spot to him?? I told him to read about it and he won't. I think he thinks I'm just talking out of my ass to make him feel better lol