The M72 66mm LAW HEAT round was pretty effective against NVA fighting positions and bunkers and everybody could carry 3 or 4 of them each. It was even fairly effective against the side and rear armor of main battle tanks (NOT the front) if you remembered that the minimumum arming distance for the rocket’s fuse was 10 meters or so. Any closer and the unarmed rocket would just bounce off.
Oh no doubt they were better than nothing. But the military scrapped them immediately.
Anyway, the Russkies flooded the world with RPG;s and they were easy to pick up.