Tragically it is not just a few injectors in my opinion. Nor anything all that simple. Minumin damage would be some bent valves I expect. Will not idle is not that great a scenario after what transpired. Lucky it would still start though. Although I would have investigated before trying to restart.

Another engine at that milage is not the end of the world and can be cheaper overall than extensive repairs.

I of course hope I am wrong. I would like to be wrong in a case like this. Fortunately in some cases in life I am.