The problem is that in theory Finn is a main character with a complex arc and a love interest of all three of the other main characters. But in practice, his arc is never fully explored, and because Disney hates gays and interracial relationships, they decided to put Rey with the Klan incel, invent a straight love interest out of nowhere for Poe, and write Rose out of the story, giving Finn the black former slave a black former slave girlfriend as a consolation prize.