Also let me add this. Adaptation is best read when DONE. So reading only per update won't really help you piece the story properly. Wc is why season 1 is goated, cause everybody was able to read the plot seamlessly. Meanwhile ongoing arcs like this one will just confuse you. If you try to reread everything again when the arc is done you'll see the difference.
Tldr: trust the process

I've read the novel multiple times so I only see the manhwa as an eye candy. So I honestly can't see why others complain bout the adaptation?
As a novel reader, Zhenya isn't actually talkative in his pov. His expressions and thoughts are narrated. So it makes sense that it's easy to overlook his expressions, since the narrator in the adaptation is the image itself.
So yes Im still gonna gloat that Han-nim is doing a great job adapting the novel. Sometimes you just have to FEEL it. Words are for novels and image are for manhwa.
If you're the type who needs words for confirmation, then please read the novel(you also get to finish the whole story by the time the next chapter even arrive). However if you're a visual reader, then look closely at the subtle expressions. Han-nim's team is actually focusing on it more. There's also the color tones and just the overall vibes. It's not a panel you should just scroll down in 0.1 sec. This is a quality adaptation I tell you. I can tell it's professionally made with the storyboarding