The initial discount is 8.6%, but then they claw some of that back by adding $450 in aftermarket add-ons. Unlikely that you want/need those add-ons. So discount ends up being 7.7% after add-ons. I think you can do better. The MF looks correct and hasn’t been marked up based on forums.edmunds.com .
So you’re upside down $3,129.27…do you really need out of the vehicle now? This negative equity is upping your monthly by at least $87. If you can ride it out and keep making payments, it may be that negative equity decreases or goes away. If you need a vehicle now, you could check to see if you can get a quote from carmax, carvana, or vroom - they may pay you more for your trade than this dealer.
Where are you located? Try to find a similar vehicle within 200 miles of you zip code on cargurus.com and check out their price analysis to get a sense of what you should be shooting for.