The problem is that the widely available tea brands (at least in America) are usually shit, and people not knowing how to make it right and end up using scalding hot water when making green tea or microwaving the water with the bag in. I get my tea from tea shops and use an electric kettle to get the brewing temps right, and now a lot of grocery store teas are disgusting to me.
I like good coffee too, but when I have it I often feel sick later and the caffeine content sometimes sets off my anxiety.