Really? The spiders? I just did that bit and barely fired a shot. Your torch does all of the work, you can't even hurt them with bullets until they roll over then 1 shot in the belly.
The atmosphere in this game is phenomenal, playing in the dark with volume cranked up is quite the experience. Although if you have arachnophobia, you're gonna have a bad time
Only downside for me is how stupidly blind the AI soldiers are, seems like you have invisibility cloak on sometimes. I much prefer the sections with monsters.