The poll isn't about what system would be most favorable to replace capitalism, only whether capitalism should be abolished or not. There are many different alternative systems of governance that could replace capitalism, such as state socialism (of the Marxist-Leninist variety), which is the particular kind of alternative that I support.
@Radical_EgoCom Here in the UK, that's what the Brexit referendum turned out to be - 52% voted to leave the EU, but without a clear, agreed-upon alternative.