Let's start with the good. It's Okay to Not Be Okay has a unique premise for a kdrama which it handles beautifully. They portrayed characters with a variety of mental health issues fairly accurately and with a lot of sympathy and understanding. The only other kdrama I've seen that addresses issues like this is It's Okay That's Love. The actors all did a fantastic job! I cannot think of a single negative thing to say about any of the actors' performances. Seo Ye Ji in particular was amazing. I thought her emotional range was really refreshing and well-rounded. I also loved how there was absolutely no love triangle and that the main couple didn't get together and break up a million times like in so many dramas. Overall it was just really well written and well-executed.

Now on to what I didn't like so much. I know I'll probably get some flak for this but I could not stand Moon Sang Tae. The character was just incredibly annoying. I desperately wanted him to have a smaller role in the show. I simply found everything about him infuriating. Yes, this was partly because of his autism and how that manifested in his character but it was mostly because of how he affected his brother. He was very selfish and it made me sad every time Gang Tae suffered because of him. Related to that I found Moon Gang Tae's character arc frustrating at times. His arc at first seems to be about learning how to take care of himself and putting his needs above those of others for once. But that arc is never realized. He stagnates halfway through due to guilt over his brother. I wish he had more character development. I also really disliked the plotline surrounding Ko Moon Young's mother. It simply made no sense. It was a huge plot hole within an otherwise very coherent show. To avoid spoilers that is all I'll say.

Overall I did really like the show but it wasn't the greatest kdrama I've ever seen. I'm happy others loved it even more than I did but it was just okay for me.