@bigboy363
Let me point out a few that i remember on top of my head.
He took the awakened cat home after he knocked it out and instead of idk, restrain it and put it in a closed room? he carelessly put it on the sofa with an open window, waiting for it to wake up. Let's not forget it's a monster who could kill people if he gets out, but apparently mc did remember ten minutes later when the cat escaped. You know what happen next.
Knowing the cat is awakened and knowing the guy beating it (the Dr.) is awakened as well (I would say it's a really unusual situation), he doesn't even think 1 second they might be looking for it if he steals it and just walks with it in town like nothing happened going to the vet( and, of course, gets discovered). Then the cherry on top, he bring the cat to Wooin, even though the thing might go berserk and become a killing machine (You wouldn't bring back a rabid dog to its owner knowing it might bite them, right?)
He tries to rescue Wooin from the Klein Brothers, even though they are super powerful international criminals. What about a simple phone call to let everyone know he found them? No, lets just go fight and get almost killed.
He almost gets rekt by the patriarch of Baekdu because he can't even tell something is fishy when he asks him to "talk alone but with two body guards". Then Kaiden had to reveal himself and look where MC is in the last chapter (126) because the information got out.
Chapter 125: Ok, this is not only on him but also on Kaiden. First of all, he goes out of his way to kill the patriarch so the secret about Jiwoo being his disciple wouldn't get out, and a few chapters later, he reveals himself again to baekdu like nothing. Why would he do something so dumb? And why didn't he think about the fact the people who f*cked him up and are still looking for him might come after Jiwoo for being his disciple? It's really contradictory and makes no sense.
Each of those stupid choices has major repercussions, and he gets in life threatening situation but, of course, he luckily gets saved at the end, and he will 100% be saved this time as well (the classic manhwa cliffhangers).
Edit: It is also supported by his general attitude of being the over friendly simple minded guy during the entire story.
The shitty thing about those cliffhangers is that, after the 10th time, there is absolutely no emotion generated anymore because the result is so predictable. No one important will die and MC won't have any long lasting effect from being beaten badly.