Take a deep breath. I think it will be ok. There is a lot of green left there.
I grow a lot of aroids, and I know a lot of people who grow a lot of aroids. I don;t grow as houseplants, but many many of the people I network with do, and they commonly buy and receive plants through the mail bare root or as cuttings, and this is what they invariably have success with. This method is called 'rehabbing', I have never had to do this because my growing area is a large greenhouse that naturally receives a lot of the elements needed for successful cutting starting. But some very very rare cuttings have been 'rehabbed' and saved by this method.
#1, the pots you have those in are way too big. You want a container that is only large enough to accommodate a small amount of substrate and the cutting.
#2, although I directly root most of MY cuttings into the ground, houseplant cuttings don;t always do well in that situation. The most common substrate for rehabbing a cutting is damp long fiber sphagnum moss.
#3, humidity is very important. PLEASE do not let other people on this forum tell you it is not. Most people who rehab these construct a mini-greenhouse for them. This can be as simple as placing a cloche over the container, and placing it near a light (but you have to remember to let it get some air too) or putting it under a plastic bag and fogging it regularly with a humidifier. Fogging is different from misting. You raise the humidity inside the bag setup , close it, and let the mist settle. You can open the bag up later and let some air in. This is also called using a mist chamber. You can see examples if you google that.
#4 do not fertilize these cuttings, and please do not resort to water rooting. They will likely rot.
#5 If your plant starts putting out adventitious roots (stem roots, like the nub I can see on the Rhaphidophora, DON'T cut these off. Mist them. Encourage them.
That is the method that my aroid growing houseplant folks use. It works for them, I believe it would work for you too
