Carhartts size up a waist size to account for shrinking, and I can almost reliably find a 34/34. Finding 32/34 in other pants is a challenge. On the subject of vanity sizing, I’m 15 pounds heavier than I was 20 years ago, and I still wear a 32/34. Which is why all those measurements are qualified above.
Finding shirts that fit is a similar challenge. Fitted shirts can usually be found in 16 34-35 with an athletic cut. Letter sizes are a total crapshoot. Sometimes I’m a L, sometimes an M. If I’m an M across the gut, frequently the shoulders are far too tight.
Not that I’m complaining as such, but I do agree that the sizes encompass too little information about body shape.