It's not exacly complex - but close enough to fit the challenge. You have a stunning scene - perfectly exposed and composed. Then you overpowered it by placing that overdone border around it. I often comment on borders but very seldom deduct points for them - this is an exception.
What a lovely sunset! The variations in the clouds are certainly complex, and the colours are wonderful. I'd have cloned out what looks to be dust and maybe have cropped off a little from the bottom. Nice work.
beautiful colors kinda surreal looking. the leaves and limbs on the right kinda interfere with the flow for me. Interesting subject to convey compexity but post processing seems to have made your point.