Most all news has some lean- whether right or left. Some more than others. However, there is a difference between a slight lean (or bias) and outright unethical and untruthful reporting. The latter seeks primarily to confuse and muddle the facts in order to instill fear, propaganda and misinformation. News tabloids fall into this category.

And while many respectable news sources may have a lean, they don't all attempt to hide their bias by presenting it as fact. So when reporting news (rather than opinion) they adhere to ethical principals of presenting both sides while sticking to verifiable facts that will not spread misinformation and/or known propaganda. The NY Post is not a reputable news source. That is a fact.

There are a few neutral news sources. One can do their own research to figure out what those are if they are so inclined. There is quite a bit of research out there on the subject. I get most of my news from a variety of news sources (on the spectrum from neutral to left leaning). Consume whatever media you want- just educate yourself on where it is coming from and what the goal of the source may be.