Don't even mention Bitcoin Unlimited, LOL
The cancer of the Bitcoin ecosystem.
The real cancer are the core developers, whom obstinately refused to listen to the bitcoin community and increase the blocksize. This has been going on for over 2 years. Their obsession with segwit when the community and miners are divided shows how pathetic these developers are. They do not own Bitcoin. They can add 'Core' calling it 'Bitcoin Core', but they still do not own Bitcoin. Their arrogance, pride and ego knows no boundaries.