I think Canon is hung around the neck unilaterally, and the lens sticks out when walking. How should I solve it? . . . .

Some lenses will stand out when the shock absorption is loose, and some with locks will be slightly better, but if the locks are loose for a long time, they will. The best way is to match a camera bag, take it out when you use it, and put it back when you don't use it. This is normal. If you want to put it outside, I suggest you carry it on one shoulder and take a little in one hand. .