Which is why no serious feminist (or gender-egalitarian or menslibber or whatever) should excuse women being bitches. But it doesn't change the fact that
>(...) When someone says "Straight white men still hold the majority of political, economic and social power in the world" they are excluding the vast majority of straight white men.
they are still, well,correct. It'd be more precise to say "rich straight white...", but the sentiment is true.
The "main issue" probably isn't singular, but my take is that
a) the dissolution of "soft" power structures (men over women, social view of whites over blacks, straight over LGBTQ+...) will take time to be culturally processed
b)activists need to embrace and push the difference between "problematic" and "bad", and push the idea that "good people" can and should be criticized for bad stuff they do, without immediately crucifying them - and the rest of the world will need to learn and embrace that difference, and also learn how to actually listen to people who might be oppressed, the difference between being publicly criticized and "having their life ruined" (there is much more to this, but this would get too long)
c) hard structures (job expectations, economic incentives) need to be changed to accommodate the (assumed as desired) new social structures. E.g. the "google memo" guy had a very good point which was very positively received in the (german) feminist circles I hung out in online at the time, namely that maybe we need to enforce "work life balance" in the fields where women are underrepresented, because if the job expectation is to forego a family life, that makes it drastically more likely for women to nope out than men.