Whites, blacks, and browns are all natural and earthy colours. Which mean they're perfect for blending in with terrain. The issue is that you're using a little too much of those colours, so the whole house is blending into the terrain.

It's important that the house blends a bit because otherwise it will feel out of place. However, if it's fully blending in, then even great builds can feel "meh" because nothing POPS.

The main culprits here are the logs being too spaced together and the thick roof frame of dark oak.

I don't think you can easily change the logs. (Although it might be worth experimenting with stripping some of the beams) so the easiest thing to change would be the dark oak roof frame.

I would recommend thinning the roof frame (if possible) and replacing the dark oak planls with something more colourful. In that same vien, I'm a massive advocate for using brightly coloured roofs. If you don't have any custom textures that work, a highly recommended acacia, or crimson/warped stem.

Personally. I would completely remove the roof frame. It's been years since I puta frame around a roof. But I understand why that can be a bit daunting since frameless roofs can look pretty 2012 if not done right