Considering the fact that droopy leaves is the main symptom of an over watering I doubt you did that. However you'r right you can over water your plant in coco but it require a lot of water but if you continue to give them 0.95L a day then it will happen. Just low your amount of water and don't water daily , wait for the coco to be not dry but close to before you water ( because a too dry medium can lead to under watering and at that stage it will be fatal ) 😊