You're most likely just getting unlucky. They can spawn in pre-1.12 jungles, but 1.12 jungles would be best.
Watch out for the crabocalypse. Some say the day will never come. But it will.
If you'd like to talk with me about other games, here are a few I play.
Left 4 Dead + Left 4 Dead 2
TES 3 Morrowind + TES 4 Oblivion + TES 5 Skyrim
Team Fortress 2
Come to think of it, I mainly play fighting-based games.