It doesn't use a Commander deck, instead creating 3/1 'Carnivore' creatures whenever it would normally draw, and sending them charging at the player with the most life
I think even if they cant explain why, part of the reason some players have that gut reaction is that spells like Ruination or Armageddon are used as griefer spells instead of win-conditions, bringing the game to a halt with no plan to victory already in play
An additional combat in this deck may be that extra push that we need to win
Plus it has warp, so you can get it into play early and recast it later
Creature - Human Pirate Firemaw Kavu Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, it deals 2 damage to target creature