I used to think that Reddit was the worst about that but Lemmy has topped it. Reddit would be filled with comments from people that were off about something small that I’m a SME about. People on Lemmy like to engage in entire comment chains that are just flat out wrong that they’re confidently incorrect about.
Reddit is an echo chamber, and in many areas, Lemmy is an echo closet. God forbid you say something true but people don't want to hear, there's nobody to come to your defense.