There's a fossil of a t-rex that's believed to have been very old when it died (like, 28ish). It had evidence of injuries all over it, including having been stabbed through the back of the skull and into the brain by another T-rex's tooth (the scar was old and healed, so it survived being bitten in the brain)

I wouldn't bet on anything but a long drawn out campaign against it

I don't care if is has feathers, or long grabby arms, I'm waiting for it to fall asleep, and chucking a spear at it, and running, every single time until it dies of bloodloss, gangrene, or exhaustion.

Does the T Rex even understand what I did? Ranged attacks didn't exist for 65 million years after it went extinct, does something that evolved to hunt slow, armored herbivores have any response to ranged hit and runs? The many species of megafauna humans hunted to extinction before the invention of writing suggests no.