I think it's just a good sampling of people's perspective this cycle (there are endless examples of the same from multiple sources), they're really just sick of trump. My ILs, one of who definitely (going to assume both?) voted trump in 2016 (I'll forgive it as a "let's try something different"), and while they never disclosed their votes for the '20 election, they have both been very vocal about NO MORE, and were saying just this past week, without any prompting - yes, we are both voting for Harris.
There's a house up on the corner of A1A (big monstrosity), they've been flying a 2020, then a 2024 trump flag for months and months, and about the time the whole purple heart thing hit, it was gone. The bar keeps getting lowered, there's only a few reasons left, a few groups remaining who are voting for trump, and well, they can carp about "policy", but that's not the reason.