Wow, pretty brave (and awesome) 1st post after a long time off. My respect for that.
And since it would be a shame that it should go without any answer, I'll go and share a bit of my perspective on awareness of social issues and how it may shape our tastes and likes. It's only a small slice of what you asked, but you asked a pretty broad slew of questions.
Up until late 2018/early 2019, I would have considered myself an apolitical guy, with next-to-no interest in what is now considered "cultural wars" or social issues. What can you do; a cis straight-passing bi white guy, I was blind to a whole host of privilege that many people who share my signifiers enjoy (yes, despite living in an economically poor country, nobody is going to discriminate against me in my own country and even abroad only in a very broad, anti-East European kind of way that is so little significant it can be ignored for the most part). To make matters, worse, I live in a country that is very, VERY backward as far as awareness and understanding the importance of social and cultural issues, as well as personal identities.
But then I started following leftist-leaning youtubers, and from there I started to further inform myself about all sorts of topics they covered: implicit bias, systemic bias, systemic racism, the whole nine yards. And it won't be overstating the case to say that it was an eye-opening experience, like exploring a whole new world that was there the whole time but you never knew it. I would like to think it has made me a better person, one who is much more careful about navigating the world and being more aware of the many, many ways we as humans can hurt and oppress each other, even when we don't mean to.
As far as how it has specifically influenced my view and likes/tastes on volleyball (and the rest of sports), yeah, supporting people who hold abhorrent views is a step I can't quite make any more. I've lost my share of athletes whom I admired due to that, and it sucks, but I much prefer that then to go back living in ignorance.