Dashcams are intended to be used to gather evidence, not to make cinematic movies. Some have the qualities you seem to want- no text on screen, good color rendering and image quality, different aspect ratios to choose from. But most of these types will cost more, the 70mai brand is aimed to be budget-friendly instead of having lots of features.
This is a good cam for it's intended purpose and is popular for that use, so you should not have problems selling it. I would suggest that an action cam is better for your needs and there are many of those to choose from.
Phil