We need to get rid of FPTP. You mathematically can't have third parties in a FPTP system, but that wasn't proven until over 70 years after The Union was formed.

Third parties are immediately quashed by the machine.

Like them or not, DSA candidates have the right of it; infiltrate the parties and effect changes from within. You cannot simply erase one of the two parties without a vast majority responding to the blatant power grab violently.

Unless you want a full blow violent revolution. In which case do you boo boo, but I would much rather a more peaceful solution for my children to witness.