The link works fine for me. The quick version is that when gorhill handed the repository over, the new maintainer immediately took actions that didn't exude confidence, so gorhill forked it into uBlock Origin, which he still maintains and is the one you should be using.
Like saying "their actions weren't exemplary" when you really mean "their actions were bad"; maybe a British-English style?
When one uses this format, like in the phrase "[something] wasn't ideal" (eg 'I crashed my car and missed my own wedding, which wasn't ideal') the claim to less-than-perfection is really an implicit statement that the object/situation was the opposite of perfection.
Presumably the new maintainer took some rather bold actions which would indeed suggest they had a high degree of confidence themselves, confidence in their own actions. But those actions did not inspire confidence in the product, among the user base.
Hey shkkmo, "isn't" isn't the right word here. In this context, the right word is subjective and everybody else understood what they're saying so the problem is with your perception of what their meaning was, not their comment!
Language does change over time and trying to ignore that after it has happened can make you a pedant. However, words still have specific meanings, even if they can change. If you decide that "isn't" has a totally different meaning than the established one and start using that new meaning without explaining it to anyone, you'll just confuse people and fail to actually communicate. If you have a group of people that all use that new meaning of "isn't" then you can use it among yourselves without clarification but should still be aware of the potential for confusing others.
Generally, when people use words they are trying to communicate something so they try to use meanings that their audience will understand. If you can clarify an incorrect use politely and without condescension, it is often appreciated and helpful.
