people telling me “that’s how we’ve always done it”
That’s not mildly annoying, it’s likely to instigate a full-on soapbox rant.
Microwave ready meals where you actually need to oven cook part of it.
Microwave ready meals which say “peel back film lid and stir” and the glue is stronger than the film.
Corollary: sticky labels on things. I bought a bin for the bathroom yesterday,* it had a big “soft close!” sticker on the front and a 3″ barcode sticker on the back, now it has two matching sticky messes.
(* – Technically I didn’t buy it for the bathroom, it’s not the bathroom’s birthday. Rather, I bought it for us to put in the bathroom.)