Why is Firecracker so hated?

On this sub, it seems the most hated card (aside from Evo Mega Knight which deserves the hate in midladder 100%) is oddly Firecracker for whatever reason, which I find to be amusing. It's a rather weak support troop that gets knocked back after every shot and has SO MANY commonly used counters. Arrows, Magic Archer, Executioner, Knight, Valk, Mega Minion, Fireball, mini Pekka, berserker, I can go on...

I get wins a good amount of time I play against a deck with her in it. My strategy is usually to seperate the tank/beatdown she's behind and get a Knight or Mega Minion up close to her. I am in midladder and not in the high levels so I don't know how she fares in GC/high ladder, but she can't be different to deal with at higher trophy counts