So, I've had a problem for the last year or so I can't get anywhere past the 30k mark in a novel. Typically, I stick with something for three weeks or so, then I 'realise' that the story is wrong and I have to write something else. Quite often I'll go back to an old broken idea because I can't come up with anything new.

I have completed many novels so I know I can do this, but for whatever reason I seem to have broken myself. I don't know if these stories fail because they're simply not good enough, or if I'm letting the voice of doubt derail me.

Anyone experienced something similar and come out the other side?