Duracell, do you mean you were hoping Kylo might’ve been pretending to be bad, like he was undercover or something?
Yeah, I think the term “bleeding” has been a gripe for some people regarding the new lore surrounding Kyber crystals, but I just understand it as a turn of phrase. If you just think of bleeding as “corrupting” a crystal rather than it literally bleeding, it makes more sense.
I thought the new canon for kyber crystals were quite celever and perfectly understood the difference between the light side and the dark side. Basically the jedi need to connect with the force, hence they “connect” or “bond” with the crystal. The sith are all about using the force for their own selfish need so they have to corrupt the crystal by “breaking” it to their will. The term “bleed” was just an obvious metaphor since the crystal turns red. I mean at this point its well established (regardless of what you think of it) that the sith have red lightsabers, so it made sense for them to add a canonical explanation as to why the colour it only applied to the bad guys. The old EU explanation was fine, but perhaps a bit too sci-fi like, and I think the new EU wanted to distance themselves somewhat from some of the less popular PT concepts and make it more “spiritual” and symbolic.