Honestly, I find this article disappointing. It speaks about events in 2017, 2019, 2020 as "how Wikipedia was infiltrated and subverted," but in truth it's just recounting the moment that some of the people and cliques who had been accruing power there for a long time went slightly more mask off. The earliest red flag it mentions is financial association with a left-wing donor group as of 2016, but it doesn't cover anything about how they came to be associated.

Anyone here who remembers Wikipedia's coverage of Gamergate should know that it already had a heavily leftist bent as of 2014, and I am certain that's not the beginning of the story either. Looking at Jimmy Wales himself, I would suggest that it was never "subverted." Rather, it was run by leftists from its inception, and only became more extreme as they themselves did.