The Rift: A popular theory suggests that a severe argument, potentially during a snowy adventure, occurred between Jax and Ribbit. Jax might have refused to help them escape, or his intensive, dangerous pranks caused a rift, accelerating their descent into abstraction. Kaufmo’s Downfall: After Ribbit abstracted, Kaufmo blamed Jax for her decline. Jax, in turn, felt intense guilt and isolated himself, causing him to treat the others poorly to keep his distance. Evidence: In the pilot, Jax quickly disappears when seeing Kaufmo's room, which is interpreted as fear or intense sadness rather than apathy. In later episodes, Jax reacts to mentions of Kaufmo with defensive anger. Jax’s Character Arc: The theory posits that Jax isn't truly callous, but uses his "mask" to protect himself from the pain of losing more friends, as he cares for others but cannot handle the emotional fallout of their departure.
this is a long theory is long so take ur time reading it :)..