@BBY_YOD4 Long range doesn't work against Caustic due to how quickly Caustic players will retreat to buildings when shot but he can't see THROUGH the gas like it says. He can only see targets immersed in the gas so he has no advantage fighting through the gas at long range. He is only dangerous at close range if his opponents CHOOSE to go through the gas or foolishly rush him.
There really is no excuse dying to a Caustic outside of the two situations I've mentioned above. He's only a threat to dangerously aggressive teams since he needs you to engage him to be a threat. Is his ability to block a push too strong? Maybe. His ability to attack is pretty weak though so dying to him is typically the fault of the player.