If interpreting initial claim to be invalidated by the prior act of signing said user agreement, constitutes a mind of hypocrisy, then the hand that signed it inherently concedes entirely by having committed the original act of contradiction by said signing then applying said name.
That being said, some character content is undeniably derogatory & belittling by definition, and some are more direct than others about it.. Crypto's "idiot" line, Bangalores FNG line, etc, etc..., , Without any enforcement to those ends, many more would have to make a similar claim for any acknowledgement of, let alone change.
Character content does has limitations. Character continuity in no way constitutes a freedom to develop characters with complete disregard.