Why are so many providers refusing to kiss or to give head?  Even a lot of the ones that will “agree to” giving covered BJ have no enthusiasm or maybe it’s lack of skill.  

Almost every provider I have seen gives BBBJ, and most do it well. You need to up your selection game.

On rare occasions I've come across an escort reluctant to kiss, I cannot think of any time that  BBBJ was not available, though here people talk about providers (and have seen some ads too) saying CBJ was all that was available. How well it's done varies but its actually very rare that they just don't even seem to be trying.

 
I would consider two things. First, hygiene. Maybe give some thought to just how fresh and clean you are showing up for the session. Second, where you are looking and which providers you are seeing.