My teenage dog pees and poos inside constantly

Hi guys, I'm sitting here, trying to wrap my head around what to do. My teenage dog (from october '24) keeps peeing and pooping inside. She will pee and poo outside on our walks (I walk her at 6, 12/14, 19/20 and sometimes at 21/22). She pees and poos during EVERY walk. I've tried containing her, but then she will sneak out of the bedroom (if I go to the bathroom) and she will pee and poo.

I have tried a steady routine, only certain food, food schedules, walking schedules, anything I can think of, and now I'm like "uhh, what to do?"

So, any advice? We have tried crate training her, as I've showed in an old post, long ago lol, and uh… yeah, she doesn't like it (she will bite the sides of the crate and try to escape, while crying and howling).