It is though.
Lets see:
Bitcoin Core
Radically altered block structure and incentives with "optional" SegWit, implemented contentiously to the degree of requiring a
Radically altered block size by keeping the once temporary maximum block threshold
Radically altered with Peter Todd's poor implementation of Replace by Fee that makes 0-conf transactions untrustworty
Radically altered critical opcodes and disabled others
Radically changed the original roadmap to second-layer only scaling to enable rent-seeking of the protocol by private entities.
Bitcoin Cash aka ABC/BU/XT :
Rolled back SegWit, corrected malleability problems without big changes to block structure or rewards or mangling the codebase with bloat
Restored the original 32mb upper threshold of Satohi's first client versions
Removed RBF, restoring the user selected security function
Which one is the altcoin wearing a stolen brand again?
Hijackers forced Satoshi's project into being a minority chain.