>>109401864Samurai Jack S5 wasn't bad because Jack killed Aku in the past. That part was fine and what he should have done. He can't leave his parents and home village behind to get tortured, enslaved, and destroyed just because Aku being dead in the past means people in the future might be altered or not born. Jack deciding to go left instead of right while walking down some road in the past could mean people in the future might be altered or not born too. He's not some future orchestrating god, he's just a guy who needs to get back from where he was unnaturally removed so he can finish his fight with Aku.
What made S5 bad is mainly Ashi becoming a major focus when she was only introduced that season. It's generally bad practice to spend your last few episodes focusing on a last minute new character instead of on the protagonist. Also the Guardian stuff was screwed up. S5 ended up making it so that the magic portal, which was so important the gods had one of the greatest warriors in the entire show spend thousands of years doing nothing but murdering anyone trying to use it, somehow got the future completely wrong and displayed a prophetic vision of an old looking Jack using it to get back to the past when that was never even a possibility to begin with (Jack being sent to the future already made him incapable of aging long before that episode).
So not only did it fail to tell the future, but it also couldn't even get something right that would have been knowable purely through already past events. Also it made it so the Guardian fought off the chosen one (for not being ready yet) but allowed Aku to destroy the portal. Aku as in the evil entity for which the entire Guardian / portal system was created to deal with in the first place. That's like a security system that keeps you out of your own home but allows through your neighborhood burglar.