How far are you? What are you thinking of the game?

Replaying this game is making me realize I have a shitty mindset for video games. The game feels easy so I feel bad when I use the tranq gun or even camo it feels like "cheating", I'm trying to play CQC only crouching only like a retard and it's stressful, as a kid I just tranq pistol'd everyone in my way and felt like a god, why can't I go back to simpelr times