Ignoring this body of work makes the linked article a straw man argument with some cherry picked examples that don’t even make a point (why am I supposed to care that AOC tweets about some people at the exclusion of others?)
If your point is that not all leftists are intersectionalists and not all people who use intersectionalist words actually have the values, then I'd respond with, "duh".
Intersectionality isn't about telling one person's story or exemplifying one person's pain. It's about showing that these things are interconnected and effect people differently, and ways in which you probably wouldn't expect. It does the absolute opposite of a hierarchy.
(I could care less about AOC. She was like 1% of content of the article I posted.)
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So to answer my question, no you can't provide a source.
Even if it hadn't been the case that the article you linked failed to mention the topic actually under discussion even a single time, a random right wing ("brexiter") blogger is not a "source" for corroborating claims that intersectional egalitarians have a clear "victim heirarchy".
(And to be explicit, identity politics and intersectionality aren't the same thing, despite the right's habit of using them as meaningless scare words)
Except reality has proven you wrong. We've never lived in a time where people are more well fed, have more personal belongings, longer life spans etc.
It is in fact, objectively, not a pointless game.