The first link is an opinion piece, you do have to take those for what they are: opinion, not fact.

Usually the Guardian opinion pieces tilt to the left/progressive viewpoint, but not always. This is something I appreciate, not being always stuck inside a bubble.

The second link offers a summary and analysis of an interview of Assange, the original piece is linked, and while I didn't read all 3 articles completely I didn't see any massive distortion jump out.

I’m in the same situation. I used the Guardian as one of my main new sources but it’s become painfully bias towards the left.

I long for a source that gives solid middle ground information and analysis.

This is also my issue with TheGuardian. Their reporting on internal issues in foreign countries is lacking in impartiality. It is not clear to me whether this is intentional or whether it is just that they put trust in the wrong foreign sources. I suspect the latter. Nonetheless they end up publishing some really ignorant and biased pieces about counties that Britons have no clue about, and thus cannot hold the paper accountable for.