Re: Caustic is the worst legend teammate to have.

In all actuality though caustic is one of the best legends IMO.

 Caustic vs Caustic  = Even playing field for the fact that a Caustic's gas can't hurt / or make an enemy Caustic less mobile.

How about playing around your teammate that is using a Caustic to give them support and staying away from the gas traps they lay down. [in a closed environment ie bunker / houses ]

What I see when I'm a Caustic: Is my teammates trying to take / steals kill when an enemy is in my gas trap and I'm sitting right there shooting them then they get caught up in the gas and get knocked. lol

Or If we're out in the open [ not @bunker or a house] The Try hard teammates won't cover me and will go out on their own trying to get kills then end up dieing as a result. While I'm trying to set up a perimeter around me with the traps. 

Moral of the story is play to Caustic strengths not his weakness, Caustic is a sluggish legends but his gas traps make up for his mobility.