That's exactly why I started my game with Ironman on, and in Classic difficulty (I'm guilty of doing that same stuff in the original games). These soldiers are Earth's last chance, and they're going to die trying defending us.
My first sniper to join the ranks, who was quickly showing promise by scoring a long range headshot, blown to pieces the next round by a shot passing through two windows of a building. The rookie who killed two aliens, got hit, panicked, and then while panicking destroyed the very alien who shot him, a tragic pile of dust on the ground shortly after.
It's my new favorite way to enjoy the game, probably part of the reason I found Kirkman's comics so interesting, the heroes make mistakes and fall. But everyone else presses on, until there's nothing left!