I don't feel the OP is directing her justified anger over her experiences of racism and sexism at the right crowd.
As a BAME woman myself, I understand that tackling racism and tackling misogyny are both huge jobs, and realistically, few people have the time in their lives to tackle both. In my own case, I have at various points had to prioritise my action to the fight against one or the other, depending which felt most critical at that moment and I don't blame other women for choosing to focus on the one that affects them most. We all do what we can do. Intersectionality doesn't only apply re race and sex, either - plenty of feminists I admire are fighting on two fronts at once re homophobia and misogyny.
I found the OP frustrating and unhelpful because it sought to blame specifically white women for not solving all problems at once. When actually they are allowed to focus on just one thing at a time.
Yes, it would be lovely if all the good people had time to fight on all fronts at once but it's not realistic so I accept that when battling racism, I will turn to support from others doing the same. When I want to fight misogyny, I will look to support from feminists on here and elsewhere. I don't usually bother raising issues re racism on here, not because I think everyone here is racist, but because I get that everyone here is busy fighting other important battles re misogyny, which I also support them in fighting, when I get a break from fighting the constant racism.
I do sympathise that fighting on two or more fronts is exhausting, and yes, there will be individuals who support me in attacking misogyny who are racist or vice versa. But to suggest that white feminists are the main problem in racism is as problematic as suggesting that BAME men are the main problem in misogyny.
In any big movement there will be inevitably be some unpleasant individuals. Doesn't mean the movement is fundamentally at fault.
Divide and rule benefits only the racists and misogynists.