If you refer to something as a bastardized form of something else, you mean that the first thing is similar to or copied from the second thing, but is of much poorer quality.
[formal, disapproval]
bastardized in British English
or bastardised (ˈbɑːstəˌdaɪzd)
adjective
debased; corrupted
a bastardized version of Russian used by merchants from around the fifteenth century