My interpretation of this line is quite different from you, though my own Jap sux as well. :p
"お前に付き合ってその果てはこんな世界だなんて冗談じゃねーぜ”
here's my trans: "Hey it's not a funny joke if the outcome of joining you is gonna be like this world (=hell)."
.......
hey, my jap isn't good enough to discuss at this level [s:32]
if there's anything wrong, my apologies [s:32]