Me to when I was younger.
The biggest factor: Less games.
When I was 16ish I only had Warcraft 2 and would pretty much play it every day. I was in a professional gaming league on a peer to peer service called Kali. My record was basically 85% wins, losing to the most elite of players.
These days "good" for me is considered say 50-60% win ratio in fighting games, or a 1.25 K/D. Yeah pretty low, but when you have 100 games like me and play a majority of them every so often things get rough.
The last game I got really good at was Halo in recent years, my K/D was way over a 2.0 and I was playing the game every night. Basically unless you can dedicate yourself to a certain game these days your going to be out classed. There are way to many professional gamers these days. Hell I remember playing online in Soldier of Fortune Payback and there was a guy running around going 30 -0 beasting at a crappy game that no one felt was competitive. Even older games on the XBox like Dead Man's Hand had some beastily players.
It's just that simple.
