You're so far off I don't know what to say.
There's really nothing to say because this is not a level of conviction that will listen to arguments - as you've yourself noticed it's result of your experiences - so if it is to be rectified it is also by experience.
You have a point about group-think but you haven't properly identified the problem and you'll get caught in a never ending struggle against each new case of it's symptoms. People prone to reliance on group-think will always find a new concept to adopt without question.
There are legitimate reasons to dislike reddit and it's community. Problem arises when people learn to dislike things without understanding why they do, even to a point of displaying the same qualities that have been the reason for the hate in the first place. Methods you've outlined don't counter that at all.

You might be better off starting some kind of a forum - you'll have easier time finding a target audience.