Make up..what am I doing wrong?

I'm getting really frustrated because I want to wear foundation, I always have. But for some reason recently the past few months no matter what foundation I use it always just makes my skin (face) look flakey and caked on. Even if I don't use very much it looks like I have a shit ton. I've used literally 10 different kinds of foundations, I've tried different brushes, a beauty blender, my hands, been through a few different moisturizers and primers.....what am I doing wrong?! Why does my face still look disgusting?! Any ideas or suggestions? Any similar experiences? So many girls wear foundation and it looks flawless 😩😩