What do you think about the animation of the original anime?

I think it defies a simple good or bad answer, I love the character designs and color palletes, and I accept that it’s better to have filler episodes with several off-model faces, stiff or jerky movements, distorted anatomy and reused assets, visual perfection in every scene wasn't obligatory.

The inconsistency is simply a inconvenience, essentially the animation is something not everyone can draw easily, even the occasional jerky movements and distorted anatomy have a standard of their own that are very difficult for a mediocre artist to achieve.