Thanks for the feedback and the edit, I appreciate it!
Now, both the things you point out were intentional. In the case of him blending in too much, I used the same colors as the background so that he wouldn't immediately pop. I wanted the viewer's eye to be drawn first to the red structure, the woman and then start to look for the danger. Maybe even follow the trail. So in this case, I don't think I want to bring him totally out of the woods. I haven't fully decided though. Maybe it creates more urgency to have him in the open, as you say.
In the case of his height, he was definitely supposed to be really large. I tried to communicate this with the trees, the fences and the buildings, but it's tricky with this perspective, the snow and the lack of human-made items. If I could put him next to a chair, a car or a banana for scale, it would be easier. So I'm not sure how to solve it, because I definitely don't want him human sized. It's a giant. But I don't want the viewer thinking I got the scale wrong, which I totally understand is the immediate reaction. Do I add more stuff to show the scale better, or move stuff around? I don't know.
EDIT: