Pants, jeans, shorts, and skirts can be hard to fit. Fabric and silhouette are important. Drape, stretch, width, darts, pleats, pockets, and structure must be suited to your figure. The right rise and inseam length can make a big visual difference.
Zone in on silhouettes and brands that typically work for you. They might be a curvy or straight fit. A petite, regular, or tall size. A short or long length. Lengths can be shortened. Waistbands can be taken in. Elastic waists are more forgiving.
Sometimes you can achieve a better fit by going up or down from your usual size. Pressing bottoms back into shape can create a better fit post laundry. Update your bottoms capsule with the right size and fit if your proportions or needs change.