I didn't really follow him, but the YouTube algorithm filled my feed with his shorts and I inevitably formed an opinion based off those. I don't watch twitch.
When I first saw the negative coverage about him with the wow thing, I thought it was just people being petty and the usual trolling
Not to the extent I'd post defensive comments, but I was on his side. I did start to wonder if he was full of it, the coverage following ross' rebuttal of his arguments confirmed it for me.
I'm not trying to convince you if he's a bad guy or not, just explain why a lot of people, including me are annoyed at him and creating a market for content pointing out his lies.
I don't want to go in depth on his background, that wikka is broadly correct although his first job was in QA at blizzard due to nepotism (source: Thor himself on stream) he left and I don't recall whether the security researcher job followed immediately but he did a stint of that where he did pen testing via social engineering (source his LinkedIn) and returned to Blizzard to work in the security department, not nepotism this time (according to him) although he had worked there before and his Dad still did which wouldn't have hurt. Then he worked at Amazon as a tester.
As for his credentials and their relevance to his take on SKG, the big difference is that Ross doesn't claim to be an expert, he's made it clear his opinion is the way the industry treats eol products is anti-consumer, that the law isn't clear on whether that's allowed, and that if you agree, you can join the campaign. Jason on the other hand is relying on his credentials to back up his arguments and why people should listen to him.
The wow thing, as I understand it, mistakes were made by several people including him, not that big of a deal, except he refused to admit any wrongdoing and banned anyone who disagreed which rubbed people up the wrong way. It might have caused less of a stir if he didn't flex on others about how good he is.