I have a wavy line that I originally draw with the brush tool and have edited a bunch with the anchor point tool. When I decrease the thickness of the line the artifacting goes away, but when I increase the thickness the artifacting appears. It isn't that visible but it frustrates me and makes the edges of the lines feel rougher than I would like them to. I have tried messing with some of the settings mentioned in other posts, but it may be a different issue than what I'm experiencing.
Thanks for reaching out. The screenshot you shared above are not working. Could you please insert the images into the body of the post.
You may also try turning off GPU performance from Illustrator Preferences (CMD/ CTRL + K).
Let us know if this helps or if you have any further questions, we'd be happy to help.