I can totally relate to that. While I did like the whole fifth season of Samurai Jack, the ending did feel a little bit rushed. I also have a feeling that this can also apply to the 20th season of South Park, with the top picture representing episodes 1-7, and the bottom one representing the last 3 episodes, one of which was forced to be rewritten because of last year's election results.
I think the creator planned it as 13, then was made to condense the last 3 into the 10th episode.
Glad I'm not the only person who thinks that!
It did feel like the last episode was rushed; I could tell. I think it would have worked better as an hour long special; but I'm not complaining about it and I can take it for what it is. At least it got to end.
Season 5 was amazing, but yeah the ending felt pretty rushed.