(Average+) Mr. Villain's Day Off

Series in one sentence:
Man is in love with a species that's notoriously too lazy to reproduce.

Series in more sentences:
Demon-like aliens have their eyes on Earth and wish to destroy the human race, but their nameless general is a peculiar man who refuses to lift a finger outside of working hours and adores panda bears.

I mostly liked this, but the nothing ending and the bits that solely focussed on the rangers dragged things down a bit. Not all comedic bits were created equally, either. 

The villain main character made the series, though I wondered if the panda obsession would get on my nerves. But well, the absurdity of it is charming. The absurdity of this alien army general having a home on Earth and participating in the human way of life is charming.
I had to think to myself to what degree, though. All throughout the series I wondered: Is this a "Good" or a less charitable "Average+"?

As much as I like seeing the guy mosey around and doing his thing, the series feels like a filler episode galore. I would've liked a bigger narrative presented, and arguably, that's the aliens invading Earth, but there's no progress in this plot. Very late in the season, it's revealed that there are other life forms who intend to attack Earth, and this goes nowhere. The series deems itself finished, despite all the open ends it created for itself.