Heavy cotton denim is hard to destroy with wear and easy to destroy with heat. Nearly every ruined pair we hear about died in a dryer, not on the street.
Wash frequency is a matter of taste. Every five to ten wears is plenty for a pair that has not been through anything. Spot-clean small marks with a damp cloth instead of running a full cycle.
The stitching on our dragon and floral fits is dense, and dense embroidery holds water. Two extra rules: never wring the embroidered panel, and keep the pair out of the dryer entirely. Tumbling snags thread ends and heat shrinks the backing fabric at a different rate than the stitches, which is what makes embroidery pucker.
Ironing: inside out only, and press around the panel, not across it.
Frayed hems and open holes are meant to fray further, slowly. A mesh laundry bag slows the process down. If a loose thread appears at a patch seam, trim it with scissors; pulling it can open the seam. Distressing that grows a little with each wash is the fabric doing what it was set up to do.
Printed patterns sit on the surface, so they fade before woven colour does. The cold-and-inside-out routine matters twice as much here, and sun-drying printed pairs face-out will fade them unevenly. Shade or indoors, always.