I skimmed the linked article and searched it for "envious losers" but didn't find the phrase you mention. It did have a nasty tone, and seemed more like a personal attack and attempt to incite anger than a reasoned response to the ideas presented.

The article presents, as an image (presumably for archiving purposes in case the tweet is deleted), a tweet from pg saying, and I quote:

@sama I think the reason you're surprised is that not being a loser yourself you underestimate the power of envy.

(in response to a tweet saying "It takes a lot for the internet to surprise me, but the general reaction to Zuck's letter did it")

As to the rest of your comment... I think you're reading something which takes an aggressive tone in promoting its argument, and mistaking that for a personal attack. There is quite a strong critique of the "startups create value" idea, beginning with the observation that they don't, really -- VCs confer value and legitimacy upon certain startups, and not on others. Which means that in a startup-based economy, such as the one pg argues for, pg and his friends would wield an enormous amount of power. In a true startup-based economy, VCs would literally be the central planners, signing off on which businesses can and can't be started (I mean, in theory someone in such an economy might privately have access to enough capital to get going without VCs, but the deck would still be heavily stacked against those people, and there aren't exactly a lot of them). And it is entirely fair game to question the motives of someone who has such a strong incentive to favor a true startup-based economy, which of course the essay does.