Holy shit, had erased Tokyo Revengers from my brain, another wretched series that started strong and then went to sit, though bin JJK defense, Tokyo Revengers peaked much earlier.
Jump is really losing series left and right though. Sakamoto and Dandadan seem like there is still content for a while (and both are awesome in their own way) and OP is there for at minimum 5 more years, but Undead Unluck is also ending (and my understanding is it had shit sales anyway) and I'm not aware of what are the "big sellers" right now outside of Kagurabachi (is it worth reading? the whole sensation that it got memed into popularity has kept me away, but as you may have noticed, I'll read any slop if it has a good hook anyway...).