My S0 (A1554) 2015 - does not have any scratches - must be luck - am not careful, wear it everyday, and often work on heavy equipment with tools and still not a scratch (knocks on wood!) battery is still good too!
You have to be more specific for discussion. What Apple Watch model are you referring to? Are you referring to the casing or the actual display that scratches?
Day one, like literally before I left the shopping center, but it’s lived in now, I’ll replace it in 1 year and then another year after that at £49 each, it’s all good, means I just use them instead of coddling them