CRUD != crud
I don't know if you are making this error, but I it all the time on /r/cscareersquestions and it is a foolish conflation.
crud: crappily-built product
CRUD: a set of UI operations on records in your data model.
You can totally have a well-built CRUD app maintained by a team that cares about code quality.
The worst CRUD applications, is where they've been extended where they are no longer CRUD but the architecture still assumes CRUD.
maybe it was intentionally conflated to call CRUD usually crappily-built
maybe i dont subscribe to your nomenclature
maybe you can have well-built crud apps (omg I did it again and this time its an oxymoron), but if you pick out a crud app at random, I'll give you 10:1 odds that its code quality is absolute garbage
[1]: https://public-blog.nrc-gateway.gov/2015/03/31/crud-another-...