late edit: DISCLAIMER: The pictured map is not actually a representation of the territories before colonisation. It’s a hypothetical map of what countries there might have been had the continent not been colonised, thus all the names and borders are fictional and have never existed.
For good actual maps, check out native-land.ca.
People use the tools they have access to, and some things are more important than worrying about using a platform that works because tool’s owner’s business model or actions are bad.