firmly believe that people who are upset with this drama is because it didn't end with Seo.

Heck, I was watching this drama while it's still on the air and it was a complete disaster. People even got the actors involved for a stupid ship.

Now having clarified this, it seems to me an excellent drama. Again we find a drama that shows us bullying for not fitting the standard of beauty. The growth of all the characters is excellent, however I want to stop here: Why do people think that Seo is an angel and Suho a demon? As much as it seems more "fun" I must remember that he did not approach Lim with good intentions, he only wanted to use her to harm Suho. He only stopped when he found out that Lim protected his sister. He also helped to further traumatize Suho by making him fully responsible for his friend's death and even telling him that he didn't deserve to be happy. Sure he had a good development, but from the beginning he did not have good intentions. Even when Lim and Suho were dating, he also did questionable things.

Regarding the triangle, there is nothing to really complain about: Lim never played with Seo and he always knew that who he loved was Suho. Point. This is not Love Alarm.

And believe me as a longtime fan of the webtoon I can safely say this: the drama did him a favor. The story went into an infinite loop where Lim's superficiality has increased, at least in the drama everyone had their growth and a happy ending.

So yeah, just get over the damn ship and see the drama for what it is. Believe me you can see that it is a good drama and it is highly recommended.