Jin is a trained Shaolin. Both Liu Kang and Kung Lao have proven the worth of their order, and that Shaolin are quite formidable and Jin is no exception.…which all would have worked so much better if her didn’t get his as beat by KUNG JIN
Jin beating Kotal is very plausible. Again, Kotal is not Shao. Heck, Kotal needed special blood magic to defeat Goro!