It happens. I had a tame Nile once. I find that the ornates (very different animals from the true Niles) are a lot more trusting and tolerant of humans than the true Niles -- but that does not mean that any individual can be tamed. I also find that the ornates tend to be bullies with respect to other lizards, even other ornates.
In my experience, handling the animal is the wrong way to go about taming it. Forced handling stresses the lizard and makes it associate you with bad things, so it just fears you more. Just let it get used to you on its own terms. When you feed it, it will start to associate you with good things, and become bolder around you. Eventually, you might be able to touch it without it running away. Start with this. When it is comfortable with your touch, you can try to gently lift it. If it squirms or trie to run away, do not restrain it, it will only undo what you had done. In time, you may end up with a tame monitor, or maybe not.
Forget about ever having a calm ornate monitor when it is young. Young monitors of all sorts are for the most part squirmy, flighty, and untrusting -- they think you are going to eat them and for good reason as at that stage in their lives everything larger than them would be trying to eat them. Almost every monitor I have ever had melowed out a lot when it grew into maturity. This may mean you will need to wait a year or two before you see any real progress with your monitor.
Best of luck,
Luke