I sort of agree. Kylo Ren is definitely the most consistently strong character across all 3 movies. I think they did a pretty good job with Rey throughout the trilogy as well, especially those 2 characters together. Finn had a really strong start in The Force Awakens, and he still had a pretty big role to play in The Last Jedi, but then he felt a little sidelined in The Rise of Skywalker. And Poe has a really interesting arc in The Last Jedi. He was a highlight of that film for me