Its good to be dubious. Its also good to include them to get a different bias into the mix. Only consuming media of the same bias will leave you ignorant without you knowing it, thats the believe I’ve come to adopt.
And you only realize which part of the bias is shared across a lot of media when you read media from outside the bubble. And a lot are within the bubble. To quote wikipedia:
progressively fewer individuals or organizations control increasing shares of the mass media.
There is enough reason to be dubious about all mass media. BBC is founded and owned by the UK government and many other publications by a billionaire family.
Previously I had thought media literacy was about chosing “reliable” sources but nowadays I believe its more about reading many of different biases and being dubious of all until their bias emerges.
IDK if that resonates with you at all or not. But I can also recommend Noam Chomskys “Manufacturing Consent”, its a classic ofc.