It's important to understand the causal direction here. As the industry took hit after hit while the internet gained dominance, media outlet like Fox News pioneered highly opinionated reporting & commentary, and it worked. Viewers & readers were more attracted to content that raised an emotional response. There's blame to put on the industry, but I can't separate that from the how the internet changed the economics of news media & how that mixed with human nature.

Incidentally, if you're looking for a good source of non-opinionated reporting, Reuters is probably one of the best. It tends to be more straightforward factual reporting, and I can't find any media ratings that place it outside the center/minimal-bias zone.