which was the first time I learned about Sita's banishment and I was very mad about that bit.

Ha, yes, a version that ends before that would be way better! Have you seen 'Sita Sings the Blues'? It's an (admittedly kinda weird, kinda experimental) animated film that crosses over the Ramayana with 1920s music and focuses on Sita's POV, especially regarding the whole trial by fire/banishment thing. It's really good! And the whole thing's available to watch for free on Youtube.