I played for the first few months; stopped the season after Swordsoul became a thing because I built that to claw my way up to Diamond and wasn't having fun with it. I liked playing Rokket / Borreload and Red Dragon Archfiend, but those become unviable at higher levels.
I mean, the metagaming is just egregious. Synchro event? Better play True Dracos!
... I never did play competitively, and only really kept up with it until the end of the first season of GX. But I saw the Borreload designs and was like "Those are awesome!" and fell in love with their gameplay, same as RDA.