After playing for a while... I had to turn the difficulty down, something about the controls, specially aiming and stealth takedowns feels super sluggish and unresponsive, making most fights quite frustrating, don't know if this is on purpose or if it's an issue that'll get fixed eventually, for now though, I'm switching to easy.
Never had an issue with the previous games, even with the original Metro 2033, but this time it's too much.