The hardware in the camera are probably not far off from what all the others use too.
You should also be careful when you compare 2 cameras together from different feeds, it dont take much before you get another result, hence why i prefer to test head 2 head on my windscreen.
Your footage the scenery are pretty uneventful, if you compare to another camera that pass by a lot of trees lining the road, the amount it have to process are significant higher.
If you have a camera with a low bitrate and you drive into a really busy scene with a lot of work for the camera, the footage can almost turn into mindcraft looking graphics.
Over the years using 1080p cameras i found using modified firmware's with elevated bitates, that when you reach about 25 - 30 mbit ( H.264 ) then you dont see as much blocking in busy scenes, which the standard 18 mbit would kick out in such areas.
But then your file size for a 3 minute segment also jump from 300 MB to close to 1000 MB.
And thats what dashcams try to avoid, at least in the old days where "big" memory cards was very expensive, and also there is the heat generation which go up as you increase bitrate, in itself also a problem for a camera on a piece of glass facing the Australian summer.