Stop right there: the learning limbo land
As a physics graduate studying on a subject knowledge enhancement (SKE) course, I agree that it's hard to find people who love a subject and want to teach it. The SKE courses do attract non-specialists who may indeed struggle with the subject matter - but at least they are showing willing!
I love physics, but I lost my way a little at university and found myself following another path. I don't have a 2:2 but I've averaged scores of 95 per cent so far in my SKE course.