It seems the real question here is how to protect a weak one HBH.
1) Learn a serve and volley game. Get to the net as much as possible. They can't hit to your backhand if you are at the net. Think J Mac- he didn't have a great 1 HBH,
2) Run around your BH as much as possible. Obvious, but you need to get into good shape and be fast to do it all the time.
3) play more doubles. I have seen some 4.0-4.5 players that can hide their mediocre BHs pretty well by playing dubs- that is assuming the rest of your game is up to snuff. Slicing your BH all the time is not necessarily bad in dubs because you are keeping the ball low.