I feel like the whole Stomach problem would've been better if Dark Treats were just one of a bunch of different criminal ventures they engaged in knowing they have pretty much free reign over the human world due to their superior abilities like the Makuu in Gavan or Abrella in Dekaranger and the premise of the show wasn't JUST the Dark Treats but Shoma, Hanto, and later Lakia dealing with random criminals of different sorts who happen to be connected to or equipped by Stomach.

Maybe they have guys running illegal mining operations that are fucking up entire towns to smuggle fancy Earth-exclusive rocks to Granute World.
Maybe prize-fighting's illegal in Granute World so they come to Earth to host bloodsports and one of the common starter forms of entertainment is throwing humans against Granutes to see how long they last.
Maybe some Granute is smuggling animals from Granute World to Earth to sell as pets and those animals are dangerous or something.
Granute VTuber running simp scams (They kinda did this but it was just another Dark Treats plot).
Most organized crime groups diversify their enterprises.

They're struggling with the "Make humans happy to get high quality presses" factor after introducing the fact Granute like Lakia can just instantly give humans mass orgasms that produce a substantial number of good presses and Lango doesn't give a shit about quality when he has to collect them himself so the Granute plots at this point feel a bit too much "Let the fear of violence drive you to despair and turn you into a Phantom" shit like the latter half of Wizard.