I completely understand their choice in not wanting to discuss Garrison during the tell all given the tragedy. I genuinely understand that. The difficulty is that K can use the inability of being questioned about Garrison to pretend he doesn't know why Janelle dumped him. It was his choice to feud with their younger sons and then neglect Savanah that led to Janelle wanting to separate from him. But that can't be pointed out, do he can pretend to be clueless.
I get that TLC is milking this situation for every last drop, but maybe they could have chosen not to go over that subject again.