Don,
Believe it or not, I think these very experienced divers really ARE trying to help you! The problem that I see (as a newly certified diver, but a long-time rock climber, paraglider pilot, backcountry skier, and tactical firearms instructor) is that you have survived multiple instances where cascading poor decisions have resulted in a near miss for you. Yet, in relating those tales, you seem to not really recognize the significance of each poor decision in that error chain. Asking "What would you do?" is a very simplistic question - folks have provided detailed analysis of your serial errors, but you just let your feelings get hurt and discard the advise. Whimpering, "Well, I admitted my mistake," is not a valid response if you KEEP making the same mistakes.
The pony bottle / tech diving thing is a prime example. Has your attitude changed since you made the tech diving statement a year ago? It would seem not. You're using a last ditch bailout bottle as if it was a piece of standard operational equipment. Let's put it into context: If you go to pull out of the driveway in your Ford F150 one morning and the brake pedal goes to the floor, would you continue your commute, thinking, "Oh well, I still have the air bags?" or would you thumb the commute, find an alternate way to work, and get the brakes fixed? That is the depth of your misunderstanding. Until you rewire that (and that's what a rescue course is for) you will continue to endanger yourself and those unfortunate enough to be diving in your proximity.