I am the wrong person to ask. If it were me, I'd tell the boss that I don't need any more training to do the job I applied for and was given to somebody else. No hard feelings boss, but if he is the better man for the job then I shouldn't be training him...
But then again I do cut off my nose to spite my face and have been accused of being "blunt" from time to time....
For what its worth, I feel for ya and wish you the best of luck.

-Bill Liptak