Well rewriting this now, you first option is very strong if you do it right, (im shorting thus since I have to rewrite it) tdlr sort by new, comment on most post you see and comment something nice about there art, then ask them to watch your animation. Some people don't like being asked, so don't ask the same person twice to watch your animation. It may seem a bit shamefully, but it's a crime your post isn't in ranking and this will get it up there, unless it's glitched to where It cannot be there. If that's the case, go plan #2, essentially just add touchups to the animation, like touch ups to the line art or so, and Re-upload, since your animation did strongly, this should be boosted in ranking. Uh forgot what I'm going to say.
Oh yeah there's also a 3rd option of giving up and letting all the effort in your animation be wasted. Please grasp on to the little hope you have left, I want your animation to succeed! You have some of the greatest potential on this app, I mean the first time you made an animation, you made something thing great! Don't let being placed in ranking decide how good you are as an artist, or how good your art is. Please grasp on to what little hope you have and do what you can to get your animation deserves.