I slogged through Netflix's "The Mouse," and here is why I got so frustrated while watching

The drama is very unfriendly. You have to get past episode 6 before you can finally start to understand things and feel like the clues are slowly unraveling.
Until then, you can't tell what they want or why they are all constantly clashing and getting entangled with each other.
Before you even get to the point of wondering "Who is the mouse?", Ryu Jun-yeol's stupid actions make you feel irritated while watching.
On the contrary, Seol Kyung-gu, who appears as a gangster, is a powerful character who possesses both high intelligence and physical strength.
Meanwhile, the protagonist, Ryu Jun-yeol, is dim-witted, has zero ability to cope with situations, lacks any sense, and only seems to pick the worst possible ways to act.
Those who have seen it will know; while the drama is immersive, I wouldn't recommend spending the time to watch all 10 episodes.
You're better off watching the "Mouse" episode of the old show "Eunbi Kkabi"; that's the original work, and it's actually fun.