It sounds like you’re doing your best for Hookfang, and it’s clear how much you care about him. Switching from reptile bark to paper towels was a great move as it’s much safer and eliminates the risk of impaction. Since he’s not eating on his own and has become very skinny, you’re right to give him Critical Care to ensure he’s getting some nutrients.
However, watery poop can indicate dehydration, stress, or an issue with his diet, so the daily soaks are a great way to keep him
hydrated. It’s also good that you’re paying close attention to his poop, as it can tell you a lot about his health.
One thing to consider is whether his setup is ideal since bearded dragons need proper temperatures (100-110°F for basking and 75-85°F on the cool side) and UVB lighting to aid in digestion and overall health.
Also, know that a lack of UVB can cause appetite loss and lethargy, so ensure his bulb is the correct type and is replaced every 6-12 months, depending on the brand. You might also want to introduce other protein options like small crickets or dubia roaches, as variety can help stimulate his appetite.
Since Hookfang is very young and already struggling, it’s a good idea to consult a reptile vet for a thorough check-up as they can help identify if there’s an underlying health issue and guide you on next steps.