Message board nerd pro-tip: You can always --- like, in every single case --- make your comment better by changing "I stopped reading" to "I almost stopped reading". It conveys exactly the same sentiment without broadcasting the notion that you haven't actually read the thing you're criticizing.
If the poster actually stopped reading I don't think adding "almost" is good advice. I'd rather read the truth than a lie. However if I read a post that says "I stopped reading" I expect a good reasoning why to see if it makes sense. Unfortunately usually it's "i stopped reading because it sucks".
I went back and read the whole thing, still could have stopped after the first point, everything else is just a supporting argument.
However I've read posts where you disagree with the same exact sentiment: credentials don't tell even the majority of the story of whether someone is qualified.