I agree that based on what was related the engine is likely somewhat damaged goods at best and scrap iron at worst. There are procedures for determining how bad the problem is.
The question is; are you willing to pay a shop to perform those tests?
That would include hydrocarbon test, compression test, and cooling system pressure test.
Even if up and running apparently fine again that does not mean there are no issues. Chronic overheating can ruin piston rings and cylinder walls with the end result being you have an oil burner and need a new engine.