Your definition of left is based on a set of issues, not on philosophy, which is not how such things are defined and thus is erroneous. There is two axes, so left/right is definitely oversimplification but it is very clearly defined.
Left/Right is split on economics, almost entirely, and specifically on the topic of private property vs public property and where the line is drawn, inclusive of many things besides real estate that count as “property”. Philosophically it is a split between Collectivism and Individualism, and almost all conflicts revolve around duty to self vs duty to society.
There are very left-wing political movements in history, including arguably the most “successful” and powerful that were pro-censorship, against free speech, and explicitly warmongering. “Anti-establishment” is a meaningless term, whoever is currently in power is the “establishment”, regardless of anything else.
HN is far more left than the typical viewpoint in the US, which is the country that dominates discussion here. The US has no true left-wing major party, but the closest thing we have (neoliberal globalists with collectivist views on social responsibility) is not only the party currently in power, but arguably put there by significant financial support from individuals and companies in tech.
You can take that or interpret that however you want, I’m agreeing with the GP to my original comment.