@rigald00
I-Revo, MxO, Double Arts, Rough Sketch Senpai, and God only knows how many more. It's like Ceiye said, if the romcoms isn't harem, wish-fulfilment, or easily merchandised, it's gonna get axed. I do believe it's sister publication is more lenient I think(Jump SQ) since Taisho Otome wasn't harem or wish-fulfilment and it comfortably ran it's course there and even got a sort of sequel.
Edit: Was about to add Mogusa-san since it only has 17 chapters on here and is lisetd as complete, but saw on Baka that it ran for 10 volumes(Monsuga was a similar case as it ran for 14 volumes) which is a decently good run by any metric. Kanojo wa Rokurokub and Sakamoto Desu Ga? were definetly cut shorter than they should have been.