Media is supposed to be objective, endorsements are a long standing tradition here in the US, ostensibly and hopefully based on a non-partisan analysis of the candidates' policy positions, record and overall character.
Having the choice between an aspiring fascist dictator and convicted felon versus the sitting Vice-President and the decision being “neither” is indeed shocking and disappointing. The Post used to have massive credibility, especially on politics. This is an embarrassment.
The intent of an endorsement is “on this basis we recommend candidate X” - it's an argument not a dictate but I understand your point.