Going back to the OP (and ignoring the row here)....
First of all, don't get mad. Easier said than done. I appreciate that horses do things that can make us absolutely livid but in this situation you have to try to maintain calm and equanimity. If you get angry it upsets them more.
Imagine things from the perspective of your horse: you're working with the human in the pasture for six months (not very long) and you seemingly have an okay relationship with this human but you may not be quite sure of them. In the pasture, however, it's not too much bother that you don't 100% trust this person because you're in the pasture, your mates are there, it's fine. Then one day you leave the pasture and go out into the big, scary wide world. You're not quite sure of this human as a herd leader and are less sure she will keep you safe when you're out of your comfort zone. There are lots of scary things out there, everything is unfamiliar and possibly dangerous. Your fight or flight response comes in and you want to run away, preferably back to the safety of your pasture and your mates. Then for no reason you can understand, the human gets really angry and starts pulling on your face and freaking you out, making the situation of leaving the pasture as bad and as scary as you imagined it to be. Once you're home, she dismounts, untacks, and turns you back out with your mates. You're safe and happy again. The next time the human takes you out, you try even harder to run home and she continues to go ballistic, tearing at your face (only this time it's even worse because she has put in a harsher bit!). This confirms your feelings that leaving the pasture is definitely a bad idea and you need to fight as hard as you can to get home, where you can relax with your mates, graze, and most importantly feel safe.
Right, so I would recommend going back to basics and following the advice the majority of other posters here have given you -- building a trusting relationship with your horse, at first through groundwork. Trails can be a scary place for a horse. If they are unsure of being out and less sure of you as a herd leader that will keep them safe, they can act out. Try to set up situations where she can win and build up her confidence in you and herself. Go just a little ways from the pasture, where she is still comfortable, and gradually increase the distance. Assorted suggestions here along those lines so I won't repeat them. Definitely don't increase the coercive measures, as that will only reinforce the horse's fear.