Attempting to value this card as "2 cost for 3 damage" (i.e. a Haymaker) shows a fundamental misunderstanding of Marvel Champions mechanics and valuation.
No, this isn't a "trash" card, it is a good (if situtational), low-cost way to have an on-demand, independent source of damage. A few folks have already mentioned its uses: plink off Tough, take out Ultron drones, or reduce Minion health for any number of card combos.
Do not underestimate that this card is Basic, so anyone can take it.
Do not underestimate that it remains on the table and is available as you need it.
Do not underestimate that you can utilize it when your Hero is exhausted.
Do not underestimate that as a Hero Action, you can use it on another player's turn.
Do not underestimate that you can use it even when your Hero is Stunned.
Do not underestimate that it a weapon and may be used with Mean Swing or Fusilade.
But no! It's a "trash" card because it does the same damage as a Haymaker over more turns. /s
Is it the best thing ever? No, but it is definitely useful and has its place for a number of specific Hero, Aspect, and Villain combinations. I think its biggest drawback is that it is Restricted, taking it off the table for most Heroes that come with Restricted weapons in their kit (Hawkeye's Bow, Mjollnir, Rocket's guns, etc).