The webtoon have realistic and better ending, why the directors changed it?

This drama made me say "stupid girl" like million times.. LOL.

Well, i know in real life many people might have that kind of relationship and make the same choice. But THIS IS DRAMA. I believe a movie or series should give the audience enlightenment, lesson to be learned, motivation, a mirror to ourselves, and all that jazz..
I imagine if some audiences who watched this have the same situation, they'd feel relate, and choosing to go with like FL is only natural.
This drama doesn't teach us to be realistic, the message is "if u love someone just go for it even if u know it's toxic and will screw u later. And yeah, just blow away the good handsome guy who really love u!" or " Listen to your heart, if u love him, go for it, even if he might be a womanizer in disguise" .. ????

Despite the story line, other things are pretty good, like the cinematography and such. However this could end in 6 episodes instead of 10.

But hey, this is just my personal opinion. If u like it, it's your right.

Nevertheless, it's not for me.