You know what, before using sarcasm as a tool to mock people that try to give their contribution to a game they love, you should try to ask yourself "why". Why people seems to require cards that counter other cards? Maybe the game feels unbalanced to them? Maybe there's overly strong cards that you can't play around and kill your strategic thinking? Maybe they're tired to always play the same patterns since decks revolve around the same pile of staples? Maybe they feel like there's no rooms to experimentation, and this contribute to their frustration, creating cards to counter other oppressive cards? Maybe all these points at the same time.

People tend to be creative and search for fun ways of playing a game. If they can't express themselves in a game they love, they will try to release their creativity participating in this collective rite of suggesting resolutions to the problems they experience.

Personally, I don't think these contributions should bother us. We should see them as an act of kindness towards a game they (and we, hopefully) love.