You don't really seem to be a bad animator. There are a few things to point out.
1) Try your best (that seems to not be a problem)
2) When you are basing something on a game, like mario, try to make it porportional to the actual game.
3)If it makes u laugh, chances are others will laugh too.
4) Do your research, like I found out that there are some bloopers done a hundred times, aka mushrooms.
5) Make it look more appealing.
If you just do these things, then u will be fine. Just keep trying and pretty soon, you will be getting high 2's or low 3's! ;-)