A couple of things that may be helpful (understanding at this point that it's a crap shoot if you lack normal ligamentous stability and I haven't examined you directly)...
Ankle joint traction. There tends to be an alteration of the position of the talus and fibula that may cause compression and limit dorsiflexion. Buy a couple mini-bands from jumpstretch.com and get the video about ankle sprains to learn how to do it. they also have info about resisted walking for rehab which is actually fun and also helpful.
Taping the fibula. If a therapist manually repositions the distal fibula and your dorsiflexion improves, you may be able to tape the fibula into a more effective position to allow exercise and even see an immediate increase in strength. See a video called Mulligan's mobilization with movement for ideas. There's some clips on youtube but I'm not sure if the ankle thing is on there.
It does sound like you need some mobilization of the joint and the above would be a start without formal therapy.
ART or IASTM may be helpful in regard to the fibularis weakness if there's extensive scarring. You may have also had really crappy therapy...this I can't be sure of, but it does happen.
You'll also have proprioceptive deficits that you need to address on a regular basis if it's recurrent.
Bill
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