I skipped over most of the thread once I seen OP losing his shit.
FINAL ANSWER: KILL THE PLANT, BUG BOMB THE ROOM THAT THE TENT IS IN, WASH THE TENT WITH BLEACH, THEN AGAIN WITH DAWN AND WATER, THEN LEAVE THE TENT OPEN AND BUG BOMB THE ROOM AGAIN.
Is the plant salvageable? Yes, you could save it for the small price of permanent infestation of every nook in your home and a future filled with spider mites crawling on you, your friends, your pets and any plants you try to grow.
Should you try to save it? Fuck no, put a garbage bag over it and then throw the plant, growing medium and pot in the trash, then reread the bold text.
Having a spider mite infestation (not just a few) not only ruins a grow space and all plants in that space, it ruins any plants that your visitors are growing at their homes when they carry your fucking mites home with them.
Mites are bad. Manageable if you catch it early but at your stage you have an infestation.
Don't be dumb, toss the plant.