I think you inadvertently debunked your own narrative here. Yeah this isn't uncommon to see at a state cross country meet - but you're deal with children and not a professional runner. 14 year olds and not a 24 year old. World's apart my dude.
Also, there is this weird narrative running that he's just "inexperienced" which led to him not recognizing the climatic conditions of the day etc which are to be quite honest, nonsense.
1) He's run 2.04.51 before so he knows what he's doing. That's faster than any American has ever run the distance.
2) He's actually had this experience before in Eugene so it's not as if he hasn't ever tested his boundaries before and then figured out first hand what they are and the warning signs of when you approach them. Running isn't like cycling where the catastrophic "bonk" creeps up on you and you go from feeling 100% to 20% in a matter of seconds - the benefit of running is you know it's coming and can adjust according.
3) On the topic of weather and tactics - let's even assume that he didn't himself recognize it was insanely hot and humid for a marathon (hard to believe but let's give him the benefit of the doubt) - he had ZERO council from anyone leading up to the race? Like no coach, agent, support person etc talked with him about tactics in general and was like "so you know it's going to be hot out there, that means you got to back off a little and see how things shake out this time..."? I mean apparently every other pro on the mens and womens side did - hence the conservative opening 10 kms etc by todays standards. I can't believe this.
So now we get back to the question. In the event that despite all of the above, this guy was like "nah I can overcome all of this and still run sub 2.04 out here" then on this particular day that's simply idiotic. Now I do agree it's a bit harsh to simply say the guy in general as a person is an idiot because of one data point (this race), but I think if I witnessed this again I think I would probably land at the conclusion that despite a lot of physical talent, he's not cut out temperament wise to be a truly successful marathon runner at the world level. But hey - should he care? He's run sub 2.05 and is making money to run - something not a lot of us get to do right? I do though agree the theatrics were ridiculous - he wasn't shot in the leg was he? Just sit/lie down and wait for your help.