emphasis was on the wrong thing
You've missed the point of the style you chose to emulate. Anime is extremely simplified and therefore easy to animate. However, you didn't focus enough on the environment. Many times when art is simplified it is so that the artist can put emphasis on something else (example: environment, objects, story, music etc.)
However this video was totally lacking in that. If you have ever watched Disney movies or looked at anime closely, you will notice that when the characters are simplified to that extent, the background and objects are given much more detail. To emphasize not the fact that the characters exist or are in a certain style, more to emphasize where the characters are and where they are going. Or the object they have in their possession (if you have ever watched a mech anime, then you see the emphasis put on the mechs, not on the people driving them.)
Anime does this wonderfully, however, many people misplace the reason that the characters are so cute and simplified. I mean no offense by saying this but you are a textbook example of a person who completely misses the point of anime.
I think this movie was a good try though. Remember, listen to people's opinions. True artists must always hear criticism, otherwise they never improve.