The plot is bland, the setting is uninspired, and the protagonist has no defining character traits. There should be more than one system user so we can see what the other classes do, and to give the protagonist a challenge fighting against the other people who use the system. Nothing ever happens outside of Korea and Japan. The world building is shallow, and there isn’t enough dungeon material integrated into modern day tech. The romance subplot is cringe and the love interest is middle C-tier at best.
On the other hand, the fight choreography is amazing and the art is incredible.
Solid 10/10 if you can turn your brain off.