Lizards that are easy to feed?

[Phillydubs]

gargoyle and crested geckos do not require live food. they eat a powdered diet you mix up with some water, can make a week's batch at a time.

I always heard this and assumed it to be true. However. I am really struggling with my crested gecko.

Hes so tiny and doesn’t exactly devour his food. I’ve had him about ten months. He was given to me as a gift.

Most crestie people I talk to say he’s tiny cause I don’t feed him bugs. Anyone else experience this ?