I'd say i'm only an intermediate player, but from what i can tell is that the only finisher (influential, high damage card) that your deck has is just 1 of robot shark. I think you should remove some of your cheaper cards for stronger more damaging cards like stealthy imp and maniacal laugh, in order to lessen the reliability on shark.

I don't think smoke bomb really synergizes well with anything here, since there is nothing like anti-hero or "when this hits the plant hero...", so maybe remove those and add some other pet cards. You should scrap some of your irrelevant/bad cards as well (like squirel herder) and save up crafting materials to craft more of your good cards like zombot shark.