I have decided..

.. that its really difficult to pretend there's nothing wrong with a colleague or his performance when you don't want to be near them, don't want to train them because its a waste of time, and need to talk to someone about it that won't bite your head off.  Or at least, even if that person wouldn't bite your head off, you don't exactly feel like they're approachable at the moment.

*sigh*

I don't love it.