Not everything in this game has to be about being the BEST! When is the last time you ever built a deck just for fun, not for stomping everyone else with the most op cards. It's nice to win and see you decks succeed, yes. But I'd rather have fun with a game instead of playing with the same stale decks duel after duel. Swift Gaia is a fun card with some fun combos, quit whining free is free.
To be fair though, some OP cards are only that because they open up more possible deck-types to explore like 'Gamushara' in a kickfire deck...
Superheadlong Rush also changed the meta further away from pure beatdown decks which helps!
He has a good point, and as a casual player I agree. Fun decks and casual matches are often overlooked by Konami, and when they add fun to use cards like these, people hate them for it.
This is how I works :
I have one or two tier 1 deck to reach KOG.
And a tons of other decks for fun (when I'm Legend 1, Platinum 1 or KOG and I can't derank), or against SD