Never really got into competitive battling. The most competitive battling I ever did was a Pokemon Tournament fundraiser we held at our school for one of our students with leukemia. It was a 25%/ 75% split for the winner.
I placed First, but not because I knew EVs or IVs. Just because I was the only one that paid attention to type advantages *I donated the majority of my earnings to the boy, I didn't need that money at the time*. So while I have never done the 'traditional' competitive battling, I have done some kind of competition with Pokemon.
Thought about actually going into the actual Competitive zones, but paying attention to EVs, IVs, Uber, etc. aspects, I decided I'll leave my battling to local events hosted by the community, and leave that to the people that actually can pay attention to it.