Hi ! Yeah i have the same feeling regarding the lack of introduction of the different organisations and there purpose but i'm steel giving it some more time to see if the author don't plan on revealing the plot through out the chapters.
As for the MC and his "mission failure" well abviously he didn't do anything wrong, like you said he killes he's target just fine and was embushed bc his organisation didn't prepare well enough.
But i think it's more that the MC is blaming himself harshly, i don't think he's coworkers really blame him even the chef didn't dare to accuse him. It gave us a strong feeling of blame bc we see it trough the MC's point of view.
And if you think about the guy who said to the MC that he should have shoot the red hair guy th 1'st that extra is mean for nothing and 2nd i think it was a way for readers to catch that the red hair guy is probably someone the MC and organisation know of, meaning there will be a back story i think.
Sorry it's a little long i hope my english is understandeble
No worries! I can understand you just fine :D
I just didn’t get it how when the mc and his team returned after the mission, the entire department was looking and whispering at the mc like it’s his fault. They were saying how they all couldn’t go home because the mission was a failure, and even the boss was like “we missed a good opportunity” or something like that. What did they expect the mc to do? MC has no magic, he even almost died. The MC did his job, he killed the guy he was assigned to kill. The end. It just seemed like the author wanted to create drama over nothing and show that the mc is going through a stressful situation which will strain his relationship with his bf or whatever.

Idk if I’m missing something, but there seems to be something lacking in this manhwa.
First of all, there is absolutely no explanation of the different organisations and their goals, what are the Templar Knights? Why are there wizards? 16 chapters in and there isn’t even a basic introduction of the groups.
Another thing I’m confused about is why the mc and his organisation all consider the recent mission a failure and they’re all blaming it on mc. MC successfully eliminated his target, but the templars appeared. Why are they blaming mc? They should blame the people responsible for providing the mission’s information, no? Why are they all acting like it’s mc’s fault? If the wizard esper guys were there to save mc from falling off the building, why couldn’t they have faced the red haired Templar guy as well?
It just seems like there are plot holes here and there, otherwise I like the secrecy and magical elements mixed with modern setting is pretty unique.