Multiple picky eaters

I myself am a picky eater and idk how my mom did it. But my kids are driving me nuts. They refuse to eat eggs, no matter which way I cook them. My first born never drank cows milk which I’m ok with but he won’t try other milks either. He won’t eat cheese, barely eats yogurt and not the healthy kind. All my 3 year old will eat is carbs. No meat, barely any rice or potatoes. No chicken nuggets. He will eat pizza if it’s delivery. He’s always been picky. Now I have a 9 month old that is following his foot steps. I give them variety like veggies fruit and meats and sometimes she will eat and other times she refuses. Won’t take formula, only breastmilk. The hardest part of being a parent is food and feeding my kids. Nothing else. Some days I just don’t know what to feed my kids and I want to cry. Anyone else going through this?