Well there were reasons why she couldn't go back to her original world, so the "Amerigo Bush" she had to go around was justified, hence it's the only way for her to leave a world her sould got forcefully stuck to.
This whole story is about a struggle to get back to the og world she was in, and in the process her journey served to uncover some truths, make people who unjustifiably got dealt good hands before to get what they deserve now, and to fulfill some people's desires. The current "Eris"'s existence there made a lot of people fulfill some sort of ultimatum they longed for in their lives before she finally left, and made others lose theirs because theirs were originally vile.
If you were just hoping for a common isekai story with romance and some happy ending for all in the new world she's in where she becomes a huge center of admiration from everyone after being the villainess before, then yeah this is not the one for you and it's okay.
Hate me if you want to. My opinion is different from a lot of people in the common section. I thought the story was boring lackluster,and the plot was just boring all that just for her to die and go back to where she came from and had to go all the way around the Amerigo Bush just to do that