That's fantastic, this has absolutely nothing to do with is age. I've seen some wonderful younger cham owners around here. This one is not one of them. He is defiant, rude and genuinely doing his other pets harm. I'd lump his recent commentary on his leopard gecko in to the animal abuse...
His eyes do look like they aren't doing well :( By your info above, it doesn't appear that you are giving him regular phosphorus-free calcium (as mentioned above as well). He needs that almost daily. If that wasn't a typo then he is absolutely under-supplemented
The poor thing! I'm in cold Canada too, finding a cham would be quite shocking. How neat that it turned out that way, though! Way to make the best of it. I'd love to see pictures! You have a very interesting hobby :D
Because so many people told you that this is exactly what they would say, when you were doing all your "research", and swearing up and down that you had the monetary support of your parents, and were busy basically slapping the experts in the face.
Good luck. I'd leave her be. Stop staring at...