> None of this inspires confidence that the code can be trusted.

It's a shame this code isn't so good out of the box, but for all we know there are proprietary devices purporting to do the same job which also have poor code. The difference between the devices is we can review, edit/improve, share, and run the improved code for this device. The software freedom is a feature unto itself. So one is still better off with this device (or another device that runs on entirely FLOSS) over any proprietary device that purports to do the same job.