In your first Benchy it looks like Y steppermotor has lost steps, a lot of steps, that's why it's shifted over. This happens when that axis doesn't slide smoothly because of a tight spot.
Second Benchy, those wavy lines are usually from resonance vibration in the frame.
Those two mechanical problems that I can see and also you have some settings issue's in Cura.
If I were you l would go over everything on the frame and get it all perfect, X Y Z axis HAS to slide smoothly, no binding, no tight spot's, at the same time your frame has to be very strong and rigid. And then you work on your Cura settings.