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.

Judging by your reviews, it appears that you are not active, but of course many guys are and no longer review or rarely do so. My point is, if you are basing the numbers on just a handful of women, then your sample set is way too small.  
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Virtually all FS, TER type providers kiss (to some degree, be it lip only, LFK, DFK, etc) and the vast majority provide BBBJ. If you look at profile after profile here, for FS providers now, you will see what I am saying is true so I dont know where you are getting this info to come to the conclusion you did.

You picking the wrong providers. Why not share a link to their ads, so we know who is not providing?