Explosives in general are far too strong in this game. It leads people to main Lars because of his passive, that 90% reduction is tempting only because it prevents being instagibbed from the 170 damage bombs. Sticky Bomb, Bomb, and especially Bomb Belt are far too tempting cards for a couple reasons.
The first reason is that 2 of those cards are 1 cost, Bomb Belt being 2 cost. The low cost just means that you'll find these cards often in many decks regardless of the build. I think the biggest issue is that these low cost cards have the potential to instantly kill players unmodified by other cards.
If all bombs in general at maximum level had 50-100 damage, they would still be good cards even though they no longer had the potential to kill instantly. If a person wanted to instantly kill someone, they would need to invest more than a single card, like using 'Bigger Explosions'.
The point is to allow fights to be fights, a good bomb ends the round. Drawing into those bombs happens frequently in back to back matches. A bomb ending multiple rounds in multiple matches adds up. Unlike other high-cost powerful combos, such as Heartless + Nuke or Mind Blowing + Bullet Time, a bomb is a 1 card kill. Yes, it's not a guaranteed kill, but neither is Mind Blowing or Heartless and it costs less to put Bomb, Sticky, & Bomb Belt in a deck than those two card combos.
Lars is an issue people commonly complain about in this thread and to their point, Lars is intertwined with explosives. If bombs went down to 50-100, Lars could have a hefty nerf. The big complaint is that Lars is the only character that shuts down a person's playstyle, bomb builds simply fail against Lars. A nerf to both Lars and Bombs would be healthier in the long run than to separate their nerfs.
Edit: Updated some minor spelling errors
Edit: Added 2 points I made throughout the thread.
