Watching original vanilla doom videos, it looks like a piece of cake compared to how ungodly hard it is in the BFG edition.
Even as a kid I could beat Doom 2, but the BFG does nowhere near as much damage as it SHOULD.
You've obviously messed up something in the game because it was NEVER this hard.
The old doom I shot a BFG near a enemy and they die, sometimes in this they take zero damage.
It never happened in the old doom, and it's inexcusable in 2012 FFS!.
Once again you've shown that great Bethesda touch.