It’s not difficult. What you have to do is pull in the exaggerated bits and see what still fits. Works for media left and right and anywhere. Reduce the hyperbole. See what sticks. it’s not difficult.
There’s not yet an objective “World History” book out there. It’s hard. There’s ALWAYS bias. But it’s not hard to find a reasonable likelihood of truth in the mess and work with that.
For example: Trump’s dislike of certain news outlets goes back decades in some cases. So his dislike of them now is easy to figure out.
He’s not a sit back and ponder personality. He’s a bit thin-skinned and seeks revenge. That’s not quantum mechanics. Just how he is. It’s not an uncommon personality.
So, you can see if that fits as a possibility. Look at the personality of the person speaking and what biases you know come from them.
Or, look at news outlets. Do they tend to favor certain areas and talk negatively about others? Take that into account. Doesn’t mean they’re honest or lying: it means you have to tone them down a little and see if there’s possible truth remaining.