Indeed: There are voting systems that are objectively better at delivering representation and safer from causing perverse outcomes. If he were to stick to that, it would be more honest. Up through George H.W. Bush the Republican party represented me just fine. Now I'm a registered Democrat. I've got differences with both parties. I think the electoral college, partisan gerrymanders, and the Senate are structurally unrepresentative, but, under a first past the post system, supporting a mainstream party is what gets you the best representation.