It's very disappointing as Reddit is mostly adults unlike other social media.
And English isn't even my first language, so I can tell you that when I come across something I don't understand, I don't act like I do, I ask for clarification or I ignore it. I definitely don't argue about things that I do not read fully or understand.
Are redditors truly that desperate to sound smarter? Why do they think they sound smart when they respond to a post or comment that they did not read?