You vote for a platform. MAGA was the platform. One might not like that they voted for a platform, but they voted for that one.

I will never get mad at someone for voting 3rd party. Plenty of folks go, "Neither of the two primary platforms are valid for me, this third one is". If the Dems (or Republicans) want to capture those votes, they should figure out what the elements of those third party platforms are. No party should feel obligated to receive a vote just because they are not "the other guy".