FormerlyHemlock
Hero
Cold comfort when the rest of the party is pushing up daisies because you didn't put your character in harm's way to take some of the heat off your allies. Excellent teamwork!
You're blaming the wrong guy in this case. The bad teamwork belongs to the PCs who failed to exploit the fact that they had sniper overwatch. Instead of remaining on pure offense, they can afford to go to defense (Dodge + cover) and threaten opportunity attacks to keep the enemy pinned more-or-less in place while the sniper kills it.
If they instead keep rolling attacks as normal, and then die, that foolish mistake is on the PC who made it. (Note: on the PC, not necessarily on the player.It can be fun to roleplay a PC who makes foolish mistakes which the player would not make.)