Baby number 4 on the way

My husband keep thinking his mom is a saintly person, he is not aware about his parents toxic tongues when he is not around. They talk very hurtful and keep calling me a useless mom in front of my kids. I feel like running away. My husband shuts me away now saying i think too much... what should i do? I am so depressed and cried while thinking why am i so blind marrying such a mommy boy!