Most inaccurate would be my Astra A-100, but it's just slightly less accurate than the next one, my S&W 4586. I've had two A-80's and the A-100, and all have been totally acceptable. Worst gun I ever had, accuracy wise, was my AMT back up 380 DA. Not so much from the barrel/slide fit, it was the insanely high effort it took to pull the trigger, making shooting it painful, and aiming it a kind of a hoping thing. After shooting a mag, a bleeding finger was the usual result.
All my other guns seem about the same, and all are better than I am anyways.