Why do you say that?
I noted that I listen to less and less 'avantgarde' and 'free jazz' in these days.
It's getting more and more difficult for me to follow the lines of the musicians, at some point I loose the road and I find myself in a unpleasant and unknown sound mess.
Maybe I am only distracted by my own thoughts and I follow them, instead of music.
It could be a temporary lapse in concentration about music in general, it will pass, I hope.
Surprised you find Complete Communion particularly difficult. I've been listening to jazz for over fifty years and am frankly most at home in the era of Pres and Bird, but the swing and emotional intensity of CC just carries me along. Now, if you said you found Cecil Taylor or Ornette Coleman's Free Jazz hard to listen to, I'd be less surprised!