I also read up to ch290 in the novel and no, it doesn't get better. None of the other characters do anything but praise the MC, unless they are a bad person who then gets replaced/removed from the project (with no action from the MC). MC has no character development and every skill is just magically obtained through the black square, again with no effort on the MC's part.
Yeh that's what happen until the end, he manages to keep his Facade but confessed the truth to his love interest (Miley Kara). He is actually a good person bc he saved 2 people from stalkers that harms them, and he is supportive to others on his own way too. His skill is just busted that he doesn't need acting methods bc he just become the character itself
The villains are just people's comments and some executives lol, some are celebrities but he manages to deal with them
Does this get better or is it a one trick pony? The premise is interesting but I keep getting confused since it reads like a chinese shameless protag with a system but the art is clearly korean style. The misunderstanding and his real thoughts give me really bad 2nd hand embarrassment. Everything and everyone just exists to praise or be a stepping stone for him and it's kinda sad. Since there's no other interesting characters, if you don't like MC, it's hard to like the story. A shame since there's actually really good and fun moments.
Also not a fan of how they gloss over all the acting methods and stories. Just came from genius actor's aura and the difference is stark