I do really think that there's a lot of value that's being missed by a ton of BLM and Antifa activists; namely, I see no evidence that most of the activists are spending the time and energy to understand the details of each case and direct their anger toward the correct people and institutions. Though, the cognitive dissonance that must come with being a "trained Marxist" while protesting a police state must be staggering.
That said, I do think that, in general, way too much focus is placed on cops.
To be fair, there are plenty of cases wherein cops should be in jail who aren't. The officers who killed Ronald Greene should be in prison. Greene isn't dead because of overcriminalization, the drug war, or no-knock raids. Assuming that the police were at least telling the truth that he was driving over 100mph, that's a legitimate reason to pull somebody over. Still, I'm not sure how much of that I believe being that the cops originally reported that Greene crashed his car and died on impact and we now have a thirty minute video of the police brutality beating him to death. Even if you don't think that the cops that killed Greene should be in prison for killing him, they should see some time behind bars for lying about his cause of death. That is a case of pure police misconduct and the anger should be directed at the cops.
The problem with the killing of Breonna Taylor, by contrast, is that only one of the officers even plausibly broke the law. Yes, there's some culpability on the part of the officers; but, to me, Taylor's death is significantly more horrifying because the police did mostly do their jobs like normal. Namely, focusing all of your energy at the cops in this case is like blaming the bullets rather than the shooter. If we didn't think that the government has the right to control what people can put into their bodies, Taylor would still be alive. Taylor isn't dead because we have law enforcement. She's dead because we have too many laws, too many stupid laws, too big and bloated a government, and a government that is all too active and enthusiastic to enforce those damn laws.
It seems odd and, frankly, counterproductive to talk about systems while seemingly not paying attention to the actual systems.