Sounds right Henley, maybe you just don't like it.
I'd be careful here. TGY brewed with a full tsp in 6-8oz of water for 5 min isn't my cup either. It would be a shame to pass it up completely because of the steeping. I brew rolled oolongs, including some TGY, in my 8oz infuser mug with about a tsp of leaf for 30-60 seconds on a very regular basis. More than that may be drinkable, but I find it loses a lot of character.
On a more general note that applies to the OP, I would say that every tea is going to have it's "sweet spot" - the way that particular tea needs to be brewed to turn out best. I suspect this is probably what most closely matches how the tea master was brewing when getting things right. Higher quality teas will usually be more forgiving, but it can all depend.
I've had plenty of oolongs that I thought were good, alright, or "just not my cup" until I finally figured out how to brew that particular tea with the very last of my stock and it turned out to be amazing. Every tea is going to be good, and once you've found what all it has to offer it will be easier to discern whether it really suits your preference or not.
The main thing is to experiment. We don't always have time to try many different ways, but I would expect that anyone with enough interest in tea to come to a dedicated tea forum would be able to find some
time to get the most from their tea
There's certainly nothing to lose, but there is lots to gain.