I am new to communism, so take this with a grain of salt.
Here in Brasil, the strongest leftist party is the Workers' Party. Communist Ian Neves and other communists condemn it as socdem. Yet Ian Neves strongly criticizes Trots who supported Dilma's unfair impeachment and Lula's imprisonment. He has also explicitly opposed accelerationism, because it leads to fascism which can make workers' lives miserable (bad in itself) and effectively crush communist movements. But I do not apply that reasoning to the dispute between the GOP and the "Democrats".
In Brasil, Lula has grave defects (bourgeois concessions), but he is far better than Bolsonaro or Tarcisio or any other neofascist, and much better even than the old supposedly civilized neoliberals like Fernando Henrique Cardoso.
In the US, would Kamala Harris be considerably better than Trump? She would have far better decorum, of course, but Palestine genocide would probably be just as bad as under Trump (as it was under Biden). She would murder Venezuelans just as mercilessly. She would give even more weapons to Ukraine. She would persecute American dissident students and leftists just as hard. All that with more competence and way more effective theater of pretending to defend democracy and human rights. McCarthyism and imperialism are bipartisan.
The only advantage I see for a Kamala victory would have been less hate and attacks on trans people. A big advantage indeed, but in my opinion that wouldn't justify defending Kamala. Leftists should vote for a real socialist party, organize, and build mutual aid. I am an ignorant cishet male, so take with grain of salt.
Anyway, you mentioned voting for the PSL (which is praised on Lemmy), so probably we agree on substance, and I only miscommunicated on the previous comment. I don't see myself as accelerationist.