There’s no reason to nerf this weapon as it has a big enough counter: Velocity.
The projectile is way too slow even if it has a great fire rate to hit somebody consistently, nerfing its damage would only kill the weapon completely.
Snowman cannon, despite its spammability, has multiple effective counters (one literally being to just run away, lol), and isn’t at all an effective weapon on anything but the 2 or 3 random you see over the course of a single day.
(even then it often doesn’t work because they have a habit of flying in one direction as fast as they can, lmao)