couple of observations, take them for what they are worth.
First of all, your gratitude and understanding of your situation show maturity and smarts. I sense you are younger, but have a good head on your shoulders.
Your appreciation of the help you received and your lack of condemnation and contempt for those who left you behind are commendable. It would be easy to be cocky or full of excuses in this situation and you are exhibiting none of that.
First and foremost, you needed to take a pause on the trip. I believe your youth and enthusiasm got the best of you when it came to pulling the trigger on going on the trip. I feel you knew it was rushed and you should have called it then. As other issues cropped up, (not finding your party, not sure if or when they would be back once you did find them etc) those were all chances to see that this was ill-advised and take a breather.
That said, I think we have all been there. I have been an avid mountain biker for years, and when I was younger, nothing could stop me and I got myself in way over my head many times. Sometimes dangerously. I was able to learn from those mistakes though and now I have tremendous respect and appreciation for the outdoors and my abilities.
I was with the Sheriff Search and Rescue here in Santa Barbara County for 10 years. The number one thing I saw in either fatalities or multiple day searches was people compounded their problems. They took what they thought were short cuts, they pushed when they should have been resting and they kept moving and not staying in one spot.
Hell, we found a dirt biker in the back country that refused to stop and rest and take stock of his situation. When we found him, his bike was on its side, he was sitting on it with his head in his hands. Dead. Rigor already set in. He pushed and pushed and just expired. If he would have found a shady spot and rested he would be here today.
Waiting until help comes to you, and then being able to be of assistance to that help and not dead weight is crucial. Sounds like you did a solid job in this.
End of essay, you will have learned so much from this, you are alive and your truck will be better because of it. Make sure you learn from the easy lessons, (truck prep), but also the more intangible ones (listening to your gut etc).
This has given you the experience to be one of those on the trail helping out others in the future.