Difficult Weapons

What weapons do you guys find difficult to use? I think weapons have different difficulty levels, like those with tough specials, requiring delicate movement, or needing good aim. My main weapon, the L3 Reelgun '箔' (Haku), is decent if you have good aim and Jetpack. Getting back to the topic, the weapon I find difficult to use is the Splatana Wiper (unmodified). That weapon demands too much: character control, adjusting the trajectory of vertical slashes, and proficiency with the Tenta Missiles. I use the 'Defiler' variant often, but the base Wiper is really unusable for me. If there are other weapons you find hard to use, please let me know!