Because the shaming tone is just infuriating. Yes, new people have problems with the system, shaming them by telling them their problems are "baffling" is tone-deaf.
Worse, if you have to shame people into using your system, it sends the message that Linux has serious problems that people need to be shamed into accepting. Shaming people into changing their behaviour basically never works by the way, outside of maybe a very insular village setting.
A better title might be, "Solutions to newcomers's most common problems with Linux", but the way it's always phrased is, "Hey all the problems are going away and you're frankly a teensy tiny brained baby if you're not using Linux!" Like, maybe fuck off. Maybe show people that the community is capable of advertising itself with literally anything besides toxicity.
I have been on-board with the mission of Linux and hearing this "Hey the switch is actually easy!" gaslighting bullshit for 15 years now. I still haven't managed to get rid of Windows 100%, and I honestly don't want to ask for help from literally any Linux fanboy because they have proven themselves to be amongst the most rabidly condescending shits I've ever spoken to.
A better title might be, "Solutions to newcomers's most common problems with Linux"
The video is about the results of a survey regarding the problems people are having using Linux. Only 10% of them described themselves as beginners. That would not be a good title.
I personally see zero condescending tone in it. The video doesn't prove to be toxic like you described either.
IMO this just isn't a good community for this, because nobody clicks on a 20 minute video to figure out what it has to do with "Linux Gaming". Plus YT links are almost always downvoted anyways. I agree that the title isn't the best, because it fails to convey what the video actually contains.