Intresting that we have 20+ different opinions and answers on this post alone, and many are subjectively right.

My answer would be that Kamala is just another pro-genocide lying ghoul who is bought by lobbyists from different sectors who don’t represent the left or working class. Trump is at least honest about being a bought pro-genocide ghoul, and that you can look at in the eyes and fight and protest against unlike genocide joe who still until this morning supports Israel with every war crime imagineable while letting Blinken and miller play mental gymnastics in hypocracy in confrences that “they’re trying their best” to end the “war” while sending $25+ billions in military weapons to an ethnostate genocidal aparthied.
With that given,

1- It’s more exausting and fruitless to fight a murderous war criminal who keeps lying than one is honest about what they want. We just want a clear enemy and be aware of it because we have been fighting a hidden enemy all this time.

2- In short it’s the “let it all burn down” logic. You saw that viral clip of Kamala voter shouting at a kid “I don’t give a fuck about Gaza removed!” ?
Emotions and psychology dictate that if I was unrepresented working class, or considered a single-issue voter because of genocide, or an Arab American whose family getting slaughtered by my government and with my tax money, then I wouldn’t to want help other issues and would want to see everyone suffers more on all other issues because Kamala would not change anything and probably help improve all other issues other than mine which in my and every fair and just reality is more important than all others.
It’s because the alternative is to suffer a slower and longer painful death while no one changing anything anyway.