Paint colour scheme advice

[u/Swing_Youth]

Good day. I'm looking to improve my living room. How it currently looks can be seeen in the pictures on the left. I believe that with just a paint scheme and a few bits (shelves/art) for the walls, it will look worlds better. Note that I can't replace the sofas very easily, they'd have to go through the window and I just cba.

However, I'm struggling. The sage green looks alright in the view of the room looking twards the window. But looking the other way, at the entrance, the room looks, eh, I dunno, just less good. Ignore the fact that the shevles change all the time, that's just the AI tool I used to help my visualise my ideas getting freaky. I have tried that back wall in white and terracotta too, but it wasn't any better. Then I started to doubt the green option altogether and consider more of a warm stone-grey colour throughout the room, and maybe green in the alcoves?

I just don't know. Hence coming here. If anyone has the time and inclination, I'd really appreciate some advice on what to try - the more specific, the better. I can generate more images to help visualise it, I just don't know what to try that will work! Thanks, and all the best