According to the international tea association, the best tea is made from loose-leaves. The pot should be warmed first by rinsing it with hot water, and then the tea should be placed in the pot, and covered with water, then left to steep according to the desired strength. However, Tea that steeps more than about 5-7 minutes tends to become bitter.
I let loose leaf tea steep for over a half hour sometimes, I don’t notice any bitterness
Well first off yes, tea is bitter to start with, second, if you put crap like sugar or milk in it of course you wouldn’t notice…if not…well then you just must be uncultured.