I agree that the movie drifted apart from the original plot line of the WEBTOON and the CGI shows some flaws in many scenes. From the monsters looking quite wacky and not fierce and epic and the labubu looking entity which many people hate (which I found adorable) the movie was quite enjoyable for a non WEBTOON reader like me.
Though the director mentioned that the film is made for people who read the WEBTOON and for the ones that did not, this movie was more to the favor of the people completely foreign to the novel. However, if we only viewed it from the perspective of just a regular movie and not an adaptation, Iโd say that the plot is quite nice. There were nessecary factors needed such as the climax and resolution:
I personally thinks that if this movie did not use the name of the web novel but rather becoming an independent film that perhaps features or inspired by the omniscient reader web novel, it would receive more love and support.
I recommend this movie to people who is new to the web novel or who is not looking for an accurate live adaptation