Sarah, your bread shaping is fine!!!!!!
From what I can see, I think the issue is on the gelatinization. The crusts look thin and dry. By all means, you need to change only one variable at a time. Could your do exactly as you do now, but try this one variable:
When preheating the oven, place a cast iron pizza pan, skillet, or pancake grill directly on the oven floor if possible, or on a bottom oven rack if not. It must preheat for a minimum of 30 minutes (1 hour best).
Do the ice cubes as instructed on TBB. Be sure to turn off convection if any, and to damp the electric oven exhaust with several kitchen towels (I can literally see the steam coming off from this exhaust when baking on my electric oven).
Is your oven convection?