Maractus

Even with access to Spikes, Maractus struggles to find a niche over other Grass-types with Spikes like Roselia and Ferroseed. Both have much greater defensive presences thanks to their secondary typings. Even when used as a lead, Maractus's stats bar its Special Attack are mediocre, most notably its Speed, which means it often can only set up one layer of Spikes before being KOed. Furthermore, Pokemon with Taunt like Qwilfish and Alolan Persian can prevent Maractus from setting up Spikes at all, or they can be removed later in the game by the abundance of entry hazard removers like Skuntank, many of which beat Maractus in a matchup, which essentially negates its one goal.