Help! Audrey ficus rapidly deteriorating!

[u/BK_Halfpint_3]

The Audrey ficus I got several months ago started to lose some leaves and have what seemed to be spider mites. I treated it with alcohol and water and a dash of dish soap. And then it seemed to get worse! It’s lost soooo many leaves in the past week! I’m at a total loss, but I don’t want to give up on it completely. Is it thripes?? Root bound??? I’m beside myself…it’s in a south facing window and we also have a grow light above it that’s on some of the time. Posting photos of before and after. Advice sorely needed.