Season 3 was rather kak:
1) Oh look 'bruce lee broken back' recovery for about all of the arc.
2) none of the students from Miyagi do (and the sensei himself) truly follows its teachings. They literally go and look for kak when they are suppose not to fight, but defend yourself/at least end the fight even before it started (smartly).
3) LaRusso not being taught everything. This was for me was retconning of the original karate kid where he was complete to do what he had to do and now magically there is another branch of teachings.
4) ffs Daniel LaRusso. Jesus christ dude. When are you going to stop going back to mr Miyagi when life gets tough or he doesn't know wtf to do? (pretty much the same for Lawrence)
5) Just too much ****ing teen drama. Too much.
6) Did we really need a back story for John Kreese? Couldn't we just go on without adding more pap where it isn't needed?
One of the things I did like was Johnny Lawrence and LaRusso becoming one as if they were one person with two parts being at war. Rest was just kak. Sadly.