It is bias if your "factual reality" over-exaggerates the "facts" for the "bad guys" and under-exaggerates / completely neglects to report on the "good guys"

There are also genuinely good guys and bad guys. Reality, itself, has a bias. To think that ideology doesn't correlate at all with how moral you might act is, frankly, stupid. Not all positions are created equal.

Which is true for all propaganda outlets.

But to put it with John Steward, what if reality itself has a left leaning bias?

What if left leaning people have empirically broader empathy [0] which could imply that right leaning people have in tendency worse personalities. I guess you would attest yet another biased article here.

[0]: https://pmc.ncbi.nlm.nih.gov/articles/PMC10281241/