Everyone is annoying.

Eh- eh huh?
You sound like a Teenager in their Rebellious phase lol.

art style totally different & downgrade from the cover as usual

Ohhh I see
Yeah you're right tho.
Kinda sad that most manhua/Manhwa are like that, i recently read another action manhwa and in the middle of the story the art style just changed.
Welp its not like we can do anything either, id still read it for the plot.
Since it's still making a story and it make sense the art style doesn't really matter.