Presumably referring to the mess that happened with uBlock when he tried to step away. That's why it's called "uBlock Origin" now; the original name was taken over by someone who then developed it in ways against Gorhill's intentions.
it was taken over by the same people behind "AdBlockPlus" which is a shakedown operation. They're allowing ads to be unblocked if advertisers pay them money.
Some history; https://old.reddit.com/r/chrome/comments/32ory7/ublock_is_ba...
The adblockplus model is extortion. They're not incentivized to serve the end user well, especially when their primary source of revenue is the advertisers the users are attempting to block.