I don't want to discourage you, but perhaps RDWC on your first go was a bit too ambitious. You could keep everything the way it is and just swap to coco or soil. From the research I did, with DWC it is a little tricky to get the environment right. And there is so much that can go wrong. Any mistake can quickly lead to plant death. Which is why I didn't want to go that route for my first try. I went with soil. Still had some problems, but much more forgiving. Now I run in coco with an
auto watering setup. You can always swap back to DWC after a few soil runs. Just to get a few grows under your belt. Research is great, but nothing replaces actual experience.
Since you asked, if it was me, I would start over in a different medium. Those plants look too far gone to be worth the aggravation to try to save them, if you even could. Good luck on whatever you decide.