This is a sorry oolong and a terrible way for someone to be introduced to oolong tea. First off Twinings is probably confusing people and making oolong seem like a specific pure tea when its actually just a way of processing the leaf. It isn’t terrible and I would drink it over Lipton (but that isn’t saying much at all). It reminds me of tea from a basic Chinese restaurant, if you got some greasy food it will compliment that nicely with its hints of dust and generic tea taste. Teabags simply can’t do oolongs.
Even when all my tea came from teabags, I had trouble with this one. I had to use cooler water and a relatively short (for teabags) steep. And you are right, this and similar teabags were my introduction to oolong. When I got my first loose tiguanyin I thought something was wrong with it :)