Have you tried any other herbal teas? The fruit ones are not as citrusy as juices. The berry ones can be fruity without being sweet. I enjoy the apple and cinnamons too. There are other herbs such as camomile and nettle and raspberry leaves. Then, as
@Estragon mentioned there is Rooibos which comes with different added flavours such as vanilla and earl grey.
I also enjoy some flavoured black teas such as chai (I am not traditional - I drink it without the sweetened milk)
And have you tried them as iced teas? I put a herbal teabag in an inch of boiling water, leave it to seep for an hour (or less if I am thirsty) and then top up with ice and cold water.
Moving away from teabags, in winter, I enjoy a ginger infusion. I grate fresh ginger into a flask and top it up with boiling water. I then use this as a concentrate with water and lemon juice ... or just water.
Then there are flavoured waters - I am not a fan because the low carb ones taste too fake but I know others enjoy them.
Very occasionally I drink a diet coke but as I drink little caffeine normally, one can at 6pm can keep me awake until 3am.
If all else fails, there's gin and slimline tonic
