Yiako

I think that you are hardly overwatered your plant. I would let her dry out as much its possible. She looks like she doesn't have O2 in her root zone. After that i would start adding really small ammounts of water and never overwater again. It should help to get her into grow. Good luck :v:

Btw that flying shits are common in warm and wet soil that can't get any O2 into root zone. So your overwatering is answer to both problems