With all the issues raised it is easier to shoot him than help him, so...
Please install the blindfold and stand 7ontheline against the wall.
However if the Governor, at the last second, signs the order sparing the condemned and freeing him for one more chance at his disc golf life then the least we can do is help with some small, confusing and contradictory advice (which is what we do at the site, with the best of intentions, of course).
The most obvious problem mentioned is choking in the middle of the round (or if choking is too strong a term then allowing one bad shot to lead to the next). In varying degrees, no one is immune to this. We are all human and our emotions and confidence levels affect our performance. So on a hot streak our confidence soars and on a cold streak our confidence wanes. It happens to us. It happens to professional athletes paid millions of dollars. It happens to the old coots who crushed 7ontheline the other day.
The better your skill and the stronger your confidence then the less you are susceptible to mid-round collapses. Experience, wisdom and mental toughness helps too.
There is no one solution or strategy which is universally effective. Depending on where your head is at, trying harder and focusing more might work. At other times for other players, trying less hard, caring less, going on autopilot might work. Some players play great when they get mad. Some players laugh it off. Some players just need one lucky break to get back on track. Experience will teach you what usually works best for you.
Here is what I do. I play more conservatively. Rather than focusing on parking my next drive, I focus on hitting the first gap of the drive. If I hit the first gap then I know that I should at least par the hole. Rather than trying to run the short upshot or long putt, I will shoot softer and safer, insuring that I don't turn a birdie opportunity into a bogey.
By playing conservative you should be able to make pars (and therefore disembark the bogey train you have been riding on). Once you string together a few holes of basic competence you can feel your confidence returning and with it a chance to recover your game.
The tournament choke is the bane of some very talented players. Their opponents know this. They might start as world beaters but as soon as they get their first bad streak or even their first unlucky break they are incapable of overcoming it. Recognizing the danger and the fact it can harm any of us, we can use casual rounds as a training ground to teach ourselves the skill of overcoming adversity. So the next time it starts to happen to you, stop to think about what is happening and cooly, rationally decide to free yourself of negative emotion and plan your strategy for recovery.
If none of this works, the firing squad needs practice too.