You seem to be very motivated and i have studied both sports psychology and ordanary psychology also i did 400 hours special physical education, so i actually know something im not just guessing.
Many of the things you say are true and i bet your post will motivate many people i used to have the greatest motivation and tenacity i have ever seen, i dident miss a training session in over a year i did 11 hours a week, i skipped school to train and went to school just to get food or go to PA i never thought i ever could loose the motivation but i did...i went down and i went down hard...drugs, depression, injury, self loathing i had it all.
I',m back now however my confidence has skyrocketed and i did a grapplingtourney yesterday where i pretty much crushed the competition (it was in intermediate level), i used visualisation and affirmation techniques throughout the tourney (and in my everyday life).
ok thats a bit about me, lets talk in general, if you look at your physical attributes you now you can change and improv them you can even mesure them pretty easily, however it always takes time. However if we choose to look at our mentality, and the psychological attributes the fact is you CAN change them, and not anly that you can change them within a heartbeat, what do you think happens to people who find god? people who suddenly realise some ultimate truths and start dedicating their lives to that truth? ever heard of anyone getting brainwashed? joining a sect?
It is foolish to think that you cannot change psychological attributes, not only can you do it but you can do it today. I know this because i was thaught this i can remember being thought it, and one of the reasons i got out of all the shit was rediscovering some old documents my former trainer wrote to motivate us.
If you want to reach your true potential in any aspect of your life you will have to do some sort of manipulation to your own psyche.
Last words, some people have a very negative thoughtstream and it affects them in every second od thier lives, its not easy for a person who is on the positive spectra to realise this (i know i dident before). ohh yeah a word of advice from my former trainer and mentor:
1) Look for the Truth
2) Beyond fighting lies the highest aspiration, to develop love, compasion and humility towards all beings.
3) We can all change and improve.
4 We can't fail unless we quit striving toward our goal. You are the only one who can say "I quit!" We are utterly relentless in the pursuit of our goals.
5) We always have a positive attitude and expect the best outcome from any situation. Always optimistic and thankful.
6) No limits; Using no way as a way, having no limitations as limitation.
7)the induvidual is always more importent then the style. This develops a self-empowering attitude.
8) We keep our ego in check. What we know about ourselves is more importent then what someone may think or say about us.
9) The secret to proficiency is consistent, correct practice over a long period of time.
10) We are polite and friendly to all people from a position of strenght until we are forced to act.
11) An attack executed with speed, style (efficient technique), and surprise is nearly impossible to defend against.