(Tekken 4 "spoilers" ahead)
Kazuya was salty because he got his ass kicked by Heihachi decades ago in Tekken 2, so 70+ year old Heihachi proceeds to kick Kazuya's ass all over again wearing a diaper in front of thousands of spectators, then Jin wakes up from a nap all groggy and STILL kicks Kazuya's ass after Kazuya taunted for like five minutes, then Jin kicks Heihachi's ass immediately afterward because that is just how little effort Kazuya took. And Devil Jin was strictly cameo status at this point.
yeah kaz is totally ryu tier.