Ah, the willfully deluded
I'm currently more frustrated with the "work for my vote" brigade. Trump is actively campaigning against you and you want to throw away your vote because the only other viable candidate didn't woo you earnestly enough? Grow the fuck up, people.
During a primary, sure, try to push your interests into the platform. But once the nominee is selected choose one or the other. Between presidential elections* is the time to work on the selection process. Once we're in the general, we're not talking about process any more.
* More precisely, 8-12 years before a presidential election is the time to work on it. You need to build the pipeline up from school board to city council to mayors to governors, just like the Republicans have been doing. If you didn't run, or work on a campaign, for your local school board, you can fuck right off about how we select a nominee for president.