Why is Taric able to infinitely hold on to his stun and zone me, when TF wasnt allowed to??

because TF's stun can be quickly followed by being 100 to zero'd

while taric's cannot.

Because Taric has no other ranged ability and TF does?

TF can also just not pick a card and wait until you're close enough before loading his yellow card. It's just not quite as easy.

Because Taric has problems and is getting a major rework.

How the hell are you getting zoned by a Taric? He stuns you Annnnnnnnnnd, thats it, he doesn't do any damage.

Tf can insta kill you sooo :/

TF isn't a support.

Thresh can do it. Blitz can do it. Annie, Morgana, and literally any other champion who can fill the support role and has a ranged CC can do it.

Do you want TF to start being balanced as a support, rather than a mage?

Because Taric can't teleport around the map, dealing very high burst damage to a champion by himself.