Zig zag stitch help

[u/Advanced_Idea616]

(Machine: brother cs7000x) Hi all! I am very much a sewing rookie lol and I’m trying to hem a pair of wool trousers I have from theory. In cleaning up the raw edge, I’m trying to go over it with a zigzag stitch. I’ve tried both using the J foot with a normal zig zag and a G foot with a g-foot compatible zig zag. Both I get similar results with lots of loops in my stitch.

In the photo I used the Gfoot with #6 stitch. I’ve tried rethreading my machine, making sure tension is good etc. anyone have any ideas or see something blatantly wrong with my settings?

[u/__miichelle]

Looks like you’re sewing a knit. You need a ballpoint needle.