*Warning, book long post with a lot of personal opinion and thought. Read at your own risk.
My thoughts and compassion on your situation are very reflective of my own journey. Everyone on the web is a "Lights out" world beater, so take my words here with a grain of salt coming from a nobody with zero talent and skill. I will most likely regret this post and my point will more than likely will be lost in translation, I hope not.
I think Richie$Rich has an excellent point in post #13. Now. allow me to expand and explain why. First, I believe you are at a turning point in your game (hopefully for the better, although it may not feel like that at this moment). Humility and self awareness can ground that inflated ego we *all* get as we become a student to the game (the higher levels of the game).
As we learn and work on the finer mechanics, in addition to the finer details of ball characteristics & reactions. This has two unintentional side affects, one being confidence and another being ego. Great, how can this be a bad thing one should ask. My response would be something like this. Confidence, is a powerful weapon in the right situations with the skill-set to back it up (Not saying you don't have that skill-set, bear with me here). The second unintentional reaction to this confidence is an inflated ego (again, not saying yours is over inflated here, just speaking in general terms).
Now, these two beasts have great strengths, they also have the ability to cloud ones self awareness and situational awareness as well. One must also keep themselves grounded and realistic to the "Here & now". As you have become more "aware & in-tune" to the finer details of the game, this opens the door for being "Way to over analytical in the heat of the moment", now add to that adrenaline & outside distractions. As our brains assess the shot at hand and path of execution with the conscious mind, we can at times flood the sub-conscious mind with informational "overload" from tons of conscious thought and over thinking.
Have you ever had one of those moments where your just shooting balls by yourself in a no pressure situation with a completely clear conscious mind, only to realize "I don't think I've missed a shot in the last 20 minutes or longer"? I'll assume that answer would be a yes. What has happen here is (what I believe), we get to a place where the mind is what we think of as " Being completely clear of conscious thought", as we look back, we can't remember saying to ourselves about every last little detail. The only thoughts we remember were saying to ourselves were "Hit here, carom off of that and end up there". Now, this does not me we are not concentrating/focusing on the task at hand, in fact quite the opposite. We are in fact in a high level of concentration and focus, it just happens that at that moment its not a conscious effort, but a sub-conscious higher level of focus. We are not flooding the mind with every single last little detail consciously, we are allowing the other senses (sight, hearing & feel) to feed that information automatically without concussion thought. I like to call this "Auto-pilot mode, others may call it The Zone or in play as, Catching a Gear". This is the level of play we all strive for in the heat of the moment hardcore competitive play. (Edit: this sounds like its ripped right out of a CJ Riley thread. I apologize if taken that way but these are my own original thoughts here)
Wow, that was a lot of spiritual "Zen" like talk, but I believe strongly in its merits, so here's even more. Based on the limited amount of information you provided in your first post, I'm assuming by being able to obtain the runs you have, you have the application skill-set to advance beyond your current level of play. The mind is a powerful thing, as well as its greatest enemy. Example from your first post, as you were watching Spanky with the horrible stroke take you to school, all your mental thoughts were focused on his poor form, meanwhile he was executing shot after shot. While at the same time, your mind was only focused on the negatives of the situation (bad karma for you). These negative thoughts breed that bad karma. When Spanky finally missed a shot and you approach the table, you have a lot of negative thoughts in addition to inner turmoil and hostility (both about his lack of form, and with what you believe to be your more fundamentally correct form) clouding and consuming your own mental processing energy. Translation would be, your brain only has a limited amount of processing power, much like a computer. Instead your brain was infected with some malware/virus (the malware/virus being negative thoughts and emotions) and wasting valuable processing power on crap, leaving even less power to focus on the task at hand. Like I said earlier, the brain is a powerful thing, learning to keep it grounded, in my opinion, is just as, if not more important than perfect physical fundamentals. Spanky was able to execute in the match, and how was his fundamental base? See where I'm going with this here?
Now, regarding you giving up on where you are at now, I believe to be a very bad move. However, this does not mean revisiting *your* fundamentals is a bad move. All of us should revisit those fundamentals on a regular basis and keep them well in-tune. I call it maintenance, much like we must do maintenance on our cars, homes or anything else mechanical in nature. Do drills if thats your thing, take video for later review if possible or seek out the help of someone you know that has the knowledge to guide you in the right direction.
While on the subject of fundamentals, allow me to express my thoughts on this subject. Notice in the last paragraph I astrix (*your*). The general consensus is there is a set standard of guidelines for what is considered proper fundamentals. I do believe there is merit to them, I also believe that we are all unique snowflakes and those fundamentals will vary from person to person slightly, or in some cases massively. Look at professional athletes of any sport, while a lot of them conform to the general application of what people consider "good or perfect fundamentals", we are not all built the same way and those fundamentals will vary slightly person to person. There is no "One single right way in this sport and many others". So, working on fundamentals can be a good thing just keep in mind what has proven to work best for you to achieve a higher level of consistency, "for you".
In closing, I think you going back to the basics (fundamentals) is always a good thing and advisable of any player on a regular basis, don't discount the power of mental conditioning as well. We've all seen great players play bad (generally from a negative mental standpoint), and we've all seen horrible players play lights out (on the flip side, having a positive strong mental approach). If that isn't enough proof of the merits of mental power, then I don't know what is.
Dopc. Mentally weak in game play, but working to improve on it.
