[Fantam]

I dont know very much about poker grader or how reliable it is for evaluating your play.

I accept that you are an experienced player and feel that you are playing well, but have recently had a large downswing. That is certainly possible.

However, its very hard to suggest anything other than to post some of the hands that you played to see whether other experienced posters agree that you played them correctly.

At least that should either boost your now fragile confidence, or it may help to spot some leaks in your game, which you were unaware of.

In the meantime, it probably wouldnt hurt to drop back down to a level which you have consistently beaten to regain your confidence, before having another try at moving up.