T'Challa does have gas masks, you know.
It's not like Bats can unleash a gas capsule and it won't effect himself or Cap if they aren't wearing gas masks. This isn't the curbstomp everyone's making it out to be. The thread originator said bloodlusted, meaning an already no punch pulling T'Challa is even more ruthless. T'Challa can think on his feet and pull off quite a few wins. There's no prep, so all 3 are on an equal playing field, except T'Challa has the best armor, best agility, best reflexes, energy daggers, anti-metal claws, and is more ruthless than his opponents.
Look at this logically, not through fan bias.
It's not as lopsided as it seems.
I say 50:50 given the circumstances in a featureless environment. The location of the battle dictates a lot. In a city T'Challa can use stealth and the environment to his advantage just as good or better than Batman.