[splitrocket]

Unfortunately, given Duverger's law [0], first past the post electoral systems eventually resolve into two party systems.

Essentially, in a first past the post system, voting for any other candidate other than the one both most likely to win AND whose politics most closely aligns with your own is effectively a vote for the major party candidate who least aligns with your politics.

[0] https://en.wikipedia.org/wiki/Duverger%27s_law

edit for link.