If they are all like that (1 ounce after 6 week veg), then it doesn't matter what you do to it. LST, topping, scrog, whatever. Nothing you do is gong to give enough of a yield to make it worth your while.
But now you mention that you only popped a single seed, I'm inclined to believe that it was just a bad pheno.
yah, i'm pretty sure like i said that wyteberrywidow got a better yield than i did from his plant(s), and he also had no issues with it during the grow that i remember..
on the other hand, another friend of mine, cmt1984 said that his wasn't very potent either, which i don't know what happened there, just going by what he had to say about his grow of it..
i'd give it a grow at least, it's surely worth a grow imo, just make sure that you plant something else along with it in case you don't get a big yield like what i experienced would be my suggestion..
i have ton's of beans, so i usually only grow a few of each during each grow to try and find that one strain that checks all of the boxes for me, so sometimes i don't get exactly the best results as i have a very limited gene pool at times if you know what i mean..
i'm sure if i were to stck to one strain for a couple of grows, i'd get better results, but that's not how i roll, lol..