Dunno what's so hard to compehend about the current state of things. Their relationship is in a very rocky spot, pregnancies are already hell to deal with, then you have Bar beating Kanji up and being on bad terms with him, then you also have the business side of things. This all happened pretty much unexpectedly too, forcing Kanji to just deal with it as best as you average farmer could. He's in a very rough spot where he obviously doesn't want to rock the boat and make things even worse. Chris is not helping either in her feud with Bar over Uryuu of all things...
All this to say this isn't black and white, the situation is complicated, and people shouldn't act like a talk of this magnitude can happen at the snap of a finger. Obviously it needs to happen but last time it did Chris burst into tears so clearly the time and place have to be appropriate.
Also Kanji isn't perfect, give the man a break. It's not like he acted spineless the entire manga, he's always had his ups and downs, that's part of life. Most couples go through these rocky periods.