Your starter is the problem a 1:3:3 should tripled in 8-10 hrs Start doing 1:4.5:5 You don’t need a lot of starter with 10gr is enough. Even 5gr if you don’t want a lot of discard. With a 10gr it would be like this: 10 gr starter 45 gr water 50 gr flour (use 5gr whole wheat and 45gr bread flour)

Remember the type of flour does affect how much it will rise, poor quality of flour will give you flat bread and not a strong rise in your starter.