User blog comment:Dargoo Faust/Someone Call an Exorcist... Battles Across Fiction Tournament Introduction/@comment-5043545-20180515011600/@comment-27043000-20180516094451

I recall Freddy only losing to teenagers in his films and sometimes adults. The only people I believe he fought were teens with dream powers and Jason himself. A huge character trait of his is that he screws around in fights in the first place.

Jason's actually lost to some people with skill like cyborgs, Tommy Jarvis, and Tina. He also survived until Part 9 in his first ressurection and was only blown up due to the fact that he was tricked and submerged in toxic waste the last movie. Jason was actually undead for the majority of Jason X and he did kill the soldiers in that state.

Another factor I'd like to point out is Jason's teleporting. King Arthur is good at fighting armies of humans, not lone supernatural slashers that can fake their own death and then shove a machete through his chest when he looks away. A lot of Arthur's arsenal also requires him to get into melee combat which is extremely bad against a guy who can decapitate people with a karate chop.