I agree. But I do think that with some more time and work it could've been way better. the war was unnecessarily short, the golb part felt like it came out of nowhere, the Bubbleine kiss felt VERY forced, there was no finntress at all,etc etc.
The war should've had more episodes spent preparing for it. not 11 minutes of watching the candy kingdom make weapons but some other stuff happening with the war prep in the background.
Imagine the war starting as it should have, we get some cool fights (Like Jake and me-mow meets again) but then during the war bubblegum and gumbald meet to have the epiphany and the rest is the same.
Marceline and bubblegum was never ever hinted at because they were afraid of being canceled, but if they already were AND had the remaining 10 episodes for the season they could've easily made one foreshadowing the final kiss.
We never got to see what happened to Huntress and Finn. Which is disappointing. and there is no reason for HW not to hang around Finn in the last music hole scene