This may be, but the probability is unarguably higher than with Trump

This is entirely arguable, Harris doesn't support Israel out of any moral reasoning, but economic.

Personally, I’d even argue that it’s unethical to not vote for a candidate like Harris, just because the chances of getting stuff like ranked choice voting or educating voters done (which will then lead to you being able to realistically vote for others) is significantly higher when voting Democrats than… letting Trump win?

This is also wrong. The Dems don't want RCV, nor would implementing it fix the system.

Notice that I don’t say you have to agree with anything else she stands for, you’re trying to achieve certain goals/get out of the very unfortunate current situation, and even a low chance of reaching that is infinitely better than none.

There is no chance under Kamala.

The only way forward is revolution. Delegitimizing Dem and Rep rule is an important step towards revolution.