Grainy and extremely noisy (HELP!)

I posted this on the Insta360 Community page, and was asked to email the issue instead. I doubt I will get a speedy reply, and will most probably have the issue drag for weeks if not months.

Just got the One R just under a week, and finally got to test it, and am struggling to get it to work.
The pictures and videos taken are terrible, with noise reminding me of the webcams in the early 2000s.
Insta360 replied to my post on FB telling me to use manual settings, but I doubt it's the problem with auto, when even the shot outside is terrible?

I need the One R for my hiking videos, where I walk under the sun, and also in sheltered areas in the forest, with varying light conditions, so having it set to automatic is not going to work for me, assuming thats the issue.

Is there a setting that I am missing that is making the footages this bad??
It's this bad on both my 4K mod and the 1 inch.

Little help here, please?

These are screenshots taken from a video clip with the 4K mod. It is not that dark in my house, so the noise is crazy.
Next shot shows the shot outdoors, where it is bright and sunny, but still noise persists.
Last 2 pics show the picture taken on the One R 4K mod, and comparing it with a picture of the exact spot taken with my OLD over 5 years Huawei Mate 10. It is not as dark as the One R makes it seem to be, as you can see.