Beginner on a downswing

OK - clearly I am not an expert, but I definitely feel that my downswing is more a product of bad cards than it is bad play. It is currently around 75BB or so - I would ascribe perhaps 25BB to beginner play, but the rest is pure variance.

This is a real challenge - has anyone else experienced anything like this right when they started out?

I am finding myself getting A LOT of marginal pre-flop hands, hitting a reasonably favorable flop and then crashing and burning on the turn and river - or I will get something like JJ and raise then reraise, only to find an A and a K on the flop.

I understand if you are already well established that you can handle the downswing by focusing on your plays and by remembering that you are a good player - but what if you can't fall back on those? What do you suggest?