I rewatched Sawan biang. I kinda get why kawee tried to redeem himself a lot earlier on compare to pattawee. I think first because Kawee is not attached to any other woman beside Narin therefore it was easier for him to realize that he love Narin. As for Pattawee, for his entire life he thought that Som was the one for him and that he love her which blinded him from realizing his growing love for Chit. Secondly, Narin was not the main one Kawee wanted to revenge on but a victim of his revenge so Kawee can easily fall for her but as for Pattawee, he always see Chit and her father as the target of his revenge that's why he can't accept the fact he's falling for her. and I think the last reason is because Narin and Chit portrayed two different characters. In Kawee's eyes, Narin always look weak, innocent and submissive so when she cry in front of him, he feel guilty for doing bad things to her especially because everyone around her always see her as a good person. As for Chit, she always appear strong in front of Wee, that's why he thinks that she's not suffering like how he wanted her too, therefore he doesn't feel remorseful toward her until later on. And because everyone in this lakorn seems to see chit as a bad person so that doesn't help much.