I just found out recently that you can turn off results from sources you don’t like. After I did that, things are a lot better.
The main issue is there are just more left leaning news sources so of course they are going to pop up more.
My approach is this:
I do a standard search and get the standard results.
I look for the key words used by the mass media outlets, the top two or three words is good.
Then I redo the search with a minus in front of those keywords.
That eliminates a ton of “mainstream” sources—because they all use the same terms.
Rinse and repeat if any mainstream/leftist sources remain.
These propaganda folks are not very creative.