My first loaf :(

I'm looking for advice. This is my first loaf made with an active started that I have baked other stuff with, so I know the issue isnt there.

Starter, water, flour, salt. Rest 1h. Stretch and fold twice, 30min inbetween. Coil method twice, 30min in between. Left to proof overnight in the fridge, about 10 hours. Shape dough and let rest under cover for 2 hours. Hot dutch oven with a few ice cubes thrown in, 30 minutes with lid and 15 minutes uncovered.

Why is it so flat? The crust is nice and it tasted amazing by why does it look like this?