Hopefully its just a phase he is going through. He needs to invest some time in you, romance you and make you feel appreciated, you are a team in this relationship. He needs to put some effort in.
Some people can be so dam selfish. Also, total loss of perspective regarding what is truly truly important in life. You are the mother to his children for Gods sake.
I’m guessing that by “Can’t satisfy him” and “no sex life” what he actually means is that he wants you to instigate sex more and him not feel “serviced” and wants you to be excited like some actress in an adult movie, rather than he can’t climax. Well, hello real world, hello life stresses, hello responsibility.
I can kind of relate to his position, in my mid 30’s like many guys, I had a disproportionate sex drive to my wife. If it was up to me, I would have been on her practically every day but with children and commitments sex on weekends became a kind of norm, 6-8 times a month and self love the rest of the time. I was “bored” wanting more excitement but in truth, I’m ashamed to say I was probably being “serviced” on 6 of those occasions and on reflection I realise now what a totally selfish, demanding git I was. If only you could live your life backwards hey…
Now in my mid 50s I have a totally different perspective. I love my wife more than anything in the world, she is my best friend, she is my everything. My sex life is minimal, we enjoy being in each others company and my priorities are totally different. You could say in some ways I have “matured” and I have various business interests which also distract me.
IF you weren’t around, he would be devasted, he probably needs reminding of why he fell in love with you in the first place. You can’t become something you are not, but this is not an insurmountable situation you are in, it’s a challenging period granted but you can work together through it.
My best advice would be to chat not fight, be mindful of his needs but explain that you truly love him but with commitments he needs to understand that sex is not as high priority for you with the children and everything else going on in your life and he equally needs to be mindful of your needs. Try and agree some date nights, some couple time to go out together, remind him of the great things you have together and what you have achieved and build on your friendship.
This is not a one-way street as I say, he equally needs to invest time in you. I can’t say if he will respond with maturity or not but as I say, you can work together through this period. Men and Women have different needs at the end of the day, the book “Women are from Venus, Men are from Mars” comes to mind.
Good luck