Despite saying you're not trying to do so, mostly you're repeating yourself. I note that you did not rise to the challenge of trying to take on any of the highly compelling evidence.
It seems that your argument basically goes as follows.
(1) Racism means individual racism, which is how people act because of their biases (i.e. it matters what is inside their heads); or perhaps legal racism, which consists of laws specifically disadvantaging some races over others explicitly on the basis of their race.
(2) There are other reasons for almost any action you can take.
(3) It only counts as racism if you can prove that the other reasons weren't factors.
(4) You can't know what's inside people's heads.
(5) Therefore, individual racism does not exist.
(6) Explicit racism in laws is now illegal.
(7) Therefore legal racism does not exist.
(8) Therefore, since neither kind of racism exists, racism does not exist.
Hopefully you can pick out where the flaws are in that kind of reasoning, once it's presented like this.
That people may see racism where none exists does not mean that all cases are that way. If you can't engage with the actual state of affairs, including fairly carefully done studies, you don't have much basis to claim that people should stop looking. It's possible for statistics to lie, but it's also possible for them to tell the truth and for people to lie by saying that the statistics are corrupted. Of course there are dangers in overreacting but if you don't carefully check out the actual dangers, it's hard to know which are which. The Boy Who Cried Wolf is not a story about how wolves are extinct.
Regarding police violence--yes, the whole criminal justice system is a mess. One can absolutely want to reform it dramatically without referencing racism at all. On the other hand, if the evidence is good that the criminal justice system is inequitably hard on blacks (and in some areas I would argue that the evidence is quite good), one can absolutely want to reform it dramatically without referencing anything but racism.
Given that we have completely race-independent and completely racism-motivated reasons to do the same thing, why we haven't done it already is beyond me.
It certainly shouldn't be because we're too busy arguing about whether a particular number of instances of police shooting unarmed black individuals is disproportionately high in a way that can only be explained by racism. Let's just actually solve the problem!
(Edit--I was having connectivity problems which resulted in this answer being posted multiple times. My apologies for any spam. It's just one answer now.)