Am I doing Freyna wrong?

No pun intended. So I'm very new and leveled Bunny first and now have Freyna. Every person I see using her she destroys enemies with huge AOE toxin pools.

I take her out for a spin and all I get is a little bloop puddle lol. I'm only lv 20 with her but when does it get better? Skill? Mods? Ult Freyna required?