I have tried different ways to do the ratlines including threading them through the shrouds, gluing them to the shrouds and tying them
I wonder what the mallet is for?Hi Short John Bronze!
The shrouds must be under tension without bending the mast. The ropes of the ratlines are usually chosen too thick. If the knots are not tightened enough and the ropes are too thick, they will spread the shrouds apart.
View attachment 210077
The back of the ropes must be pushed tightly together. So the ladders go away nicely to the left and right.
View attachment 210080
Try with thinner ratlines, tighten the knots a little tighter and more horizontally. You can push them up and down on the model with tweezers and loosen them again at any time if the tension is wrong.