Variety in sex

My husband and I have been living together for six years. I had a baby. And, then the problems started. Problems in everything, but especially in sex. My husband is not happy with everything - he wants to, and I'm with the baby at the same time. He wants it in the park, behind a tree, so people can walk by. He wants gangbangs, he has such a variety, and I don't like it. He's always looking at porn photos, videos. I do not know how to change the situation - you can just enjoy life, in all its manifestations, and not just see the interest in sex. And the tension in which he has put me - deprives me of pleasure in sex. Maybe someone also has such problems?