I've had my bearded dragon for 8 years now is he getting pretty old.
He is very picky. Won't eat anything besides horned worms and the odd pinky or hopper , the other day I got 2 dusted super worms into him also . The odd time I can get him interested in crickets and other things like wax worms or butter worms. He will not eat veggies so I feed them to the feeders before I feed them to my dragon .
The other day he ate to pieces of kale for the first time in a very long time, but won't eat it anymore now.
Have you tri re d offering different greens. My babies won't eat veggies all the time either. However, I give fresh veggies every morning and dubias or mealworms at night. My beardies don't eat crickets either. Sometimes you have to offer nothing but veggies for a couple of days and when rthey get hungry they will eat them. Mix it up too, as variety is the spice of life. Pumpkin loves red peppers while Popeye is a fan of prickly pear cactus (pumpkin won't eat the cactus at all). I just mix some in with their greens. I haven't tried it but there is a salad dressing out there for bearded dragons that is strawberry flavored I think. also if you don't have it go to the nutrition section of beautifuldragons.Com for a wonderful list of good and not good veggieS and fruits. Don't give up, veggies are necessary for your beardie and should be the main food option for adults.