They don't even want the same candidate. Whenever those candidates come up they complain that they sold out or they're not radical enough. Whatever the deeper motivation is, their only perceivable act seems to be to complain.

As to action, I do agree with the general sentiment that it needs to be sustained. The protests need to have a cost and disrupt regular life beyond just people taking a day off. But I think things are tense enough that something like BLM could kick off again. People just need to believe it's time. A protest day after day, or a multiweek protest on a specific day, could convince people it's real. A one and done protest following the prescribed route isn't useless (it reminds people that basically half the country hates the guy), but it's something people see and think they did their resistance and now it's back to regular life.