which is it?
You dont/cant train it to like you or not see you as a threat. Your trying to override evolutionary instinct. Let the lizard decide, its as simple as that.
If you develop a routine, it will learn to associate you with various interaction, feeding, cleaning, misting and will, in it's own time become less concerned with your presence.
There is nothing you can do 'to keep them docile', either it is, or is not, period. Continual handling in a misguided attempt to do so, will only stress and eventually sicken , your lizard.
No, I dont mean that. I mean you claim to have read 3 books and done a bunch of research, yet you post asking why your chameleon is 'mean'. This suggest you still dont understand reptiles basic behaviours, and that whatever you did read was poor/outdated advice, you accepted on face value without thinking for yourself or giving it much consideration.
This is what frustrates and annoys me. Not you personally, your no different from a thousand other folk who decide to get a reptile pet, then ask questions they should already know better.
As I said, bad day here, im not normally such an ahole about it, but its small things that p us off when we are already cranky.
I apologise and give you credit for your descision to limit the handling of your young lizard.
Just dont expect so much, afterall, as somebody said 'It's a chameleon'.
cheers