Feelin' your pain Chicken, I almost felt like I was reading my own written words. You're probably going to hear talk about fundamentals, focus & mental conditioning. Which are all probably spot on to a certain degree.
My thoughts go like this, as we progress and witness improvements in our abilities, our self expectations rise faster than our abilities increase. While other people comment on our improvements, this only feeds the self expectations beast. We know we can execute nearly everything we face as we've done time and time again. The problem here is when we set our self expectations higher than our true abilities can execute consistently *under pressure*. I don't mean that as a negative thing either, it's more of a self awareness thing.
I've recently had an evaluation from an AZB user who also happens to be an instructor (Thank you scottjen26, If your near Jacksonville look him up, Scott is the real deal and he can play). Scott spent many hours reviewing videos and countless back and forth e-mails. What I've come to discover is, the magic secret I am in search of does not exist. This doesn't mean there isn't room for improvement, just the improvement I'm in search of will come in very small increments at an almost unnoticeable rate. Those improvements we are in search of are consistency as well as reducing or eliminating errors.
My second thought on the matter goes like this. How we train and how we compete. While practicing (I have a table at home), I'm in a comfortable environment with little outside distraction, combined with familiarity of the equipment and I can reach a level of focus and attention that at times makes me say to myself "wow". So now my personal expectations have inadvertently risen to expect this level of play on a regular/on demand basis.
Now, fast forward to the local tournament or league play, and all of a sudden the shit hits the fan and I start to notice these quirks arise in my game. I execute a tough shot, get the tough 3 rail shape through traffic leaving near perfect shape on the next shot. That next shot will be an easy 5 degree cut in the side that any "C" level player could execute with their eyes closed, and of course I hit the tit, miss and sell out the game.
I have come to realize just how much of a factor adrenaline and pressure plays a role in execution. The proverbial "Heat of the moment" scenario. Now along with that, throw in equipment variables, environmental variable elements (both temperature/weather & human distractions). I have come to realize the environment from which I compete is not the same as to which I practice or train in. I have also realized how much my game changes due to self doubt, inner turmoil and fear of failure to execute. It's almost like I have two completely different games, My in focus comfortable game and my in competition game. My in competition game is what needs the most attention, I just haven't found a way to duplicate that environment during practice time at home. I play races against the ghost, but it's just not the same at all.
A few things that have helped for me recently is to work on consistency in my pre-shot routine, think & aim when standing and not once I'm down on the shot (got that tip from another user here on AZ but forget the user to give credit to). Walk around the table outside the box to allow my brain to absorb as much as possible from all angles of view. Work on a consistent stance and setup to promote good execution and to reduce feeling uncomfortable and/or plagued with indecision. I'm working to keep an even speed of play, I tend to get in a zone, speed up play and start skipping steps and sooner or later WILL make a mistake. So basically for me it's all about keeping myself grounded under pressure or when the adrenaline is pumping hard. With all this said, I still screw up, but so does everyone else most of the time. After all we're all human and none of us are perfect, even though we may demand that of ourselves.
So in a sense it does boil down to fundamentals, we just don't like to admit to that as we reach higher levels of play ("we" as in general not particularly you or I). I do drills but admittedly I'm not a huge drill fan. The drills I have been doing are mostly based around pre-shot routine as that is where I need the most improvement in competition at the time. Another drill I'm working on is "Breathing", I've done some research and sought outside insight from coaches of other sports on how athletes deal with adrenaline. Every single one mentioned breathing exercises and feeding oxygen to the body under stress. Something I have never been aware of as I never played any organized sports growing up. That has proven to be the biggest help for me over anything to date, no lie.
So in closing, you're not alone. I believe it's all a part of advancing to that next level. For every level of advancement from "B" speed on, it's tiny micro steps of improvement. For those of us that are perfectionists and demand nothing but excellence from ourselves, these micro steps can come at a painfully slow rate of improvement. Accepting the fact that you may have failed today, but keep in mind there's always yet another day to do battle. So plan, practice & work on mental conditioning for that next battle. You have the pool addiction and there is no known cure..............
Dopc. To long winded and fails to get to the point quickly......