^I know I do, and not just in lag either. When I play with people like RenderingStar-sensei, one stun and I completely lose focus xD Sometimes I play good and then sometimes I'm being played >.>
Took me that much to get "somewhat decent" during the SF4(Arcade Edition and Ultra) days, on Tekken Tag 2 my highest rank was only Berserker with Devil Jin, and compared to the top players I'm "meh" at DOA. Give it time, it's not like you'll body everyone everyday and everytime. I have my days where I'm beating ppl up, I have my days where I'm everyone's punching bag.
I think we all have this knee-jerk reaction to tell people that everything will be okay.... I blame Hollywood Chick Flicks.
If We really love Spine then we gotta respect his wishes. Its unfair to prolong His suffering with False Hope...... if taking a break (even if its permanent) from DoA (or Fighting Games in general) would help even alil then I think he should atleast Try it.
If you truly made up your mind, then I have one bit of advice. Try not to focus too much on perfectionism in your future endeavors. It could drain you mentally. If you change your mind... well, there you go.