Responses

No, NOW he's learning. The way this is phrased makes it seem like you think he's been a good guy all along. There's no way we are reading about the same characters, try rereading S1 and saying the same thing
Jaekyung is still genuinely convinced he's doing this for his jinx, Dan is not a human being in his mind... YET
Jaekyung doesn't get enough credit. He's a pretty solid guy, just really grumpy.
And Dan's just being stubborn and unreasonable.