To trust or distrust the media rather depends upon what is the subject matter of the report.
A weather forecast can be given different degrees of trust, depending upon how far into the future it extends. Past experience suggests the confidence level drops as the forecast is extrapolated further into the futur.
Local events like birth, marriages and deaths can be trusted when reported, as can car crashes, bank robberies etc.
It all starts to fall apart when international events are covered.
All governments have an agenda and the population may or may not be party to them. For example project gladio was hidden from europeans for decades.
Anything reported to do with politics, terrorism, wars and going to war should be treated very carefully.It is fair to say that in these cases the presented narrative in many mainstream sources is that of the government. They endeavour to put their behaviour in the best possible light in order to carry the public with them. Whatever is presented in these circumstances should always be questioned. RT often provides an alternative narrative. No doubt the truth in somewhere between the two. To have the mindset that you trust one source implicitly plays right into the hands of government.
Far safer to ask Cui Bono? when making an analysis of news.