Well, mine doesn’t burn.
I place it on parchment paper in The Dutch, and the bottom is shielded by the steam tray underneath. Also could drop the temp another 10 to be safe, or raise the rack to mid tier if your Dutch oven will fit.
I like the crust dark brown as well so it’s got an almost charred profile, but still not burnt.
All needs to be adjusted for your oven and area..