Unfortunately, people like that are an outsized problem wherever they exist. The extremes are often the most visible parts of a group, especially in the world of algorithmic relevance. If you really want to see whatever your group is achieve cultural success, those people are counterproductive.
I dunno how many are there but there were a lot of them at some point. Maybe I just ignore them now, but outsiders of the clique don't know that even we don't take them seriously.
I just say I don't use windows anymore so I can't help you from the windows side of things.
And not following instructions are something that needs to be undone slowly. I tend to just point out the instructions they missed and how they could have avoided the whole ordeal if they read that. Unfortunately you need to teach (or unlearn the windows habit) people that in Linux there's no BS next next next where there's no useful info given.
and i just repeat that and be like i cant help you, i will probably make things worse (shrugs)
and i get that, at that point i would just say nothing cause thats better than a negative impression. just imagine a 3 yr old and be like they dont know any better.