The things you claim are now "pandering to the lefties" were never on your side, to begin with.
If you consider yourself a fan of these things, but you still think the #LGBTQ+ community is too "in your face", or have a problem with #BlackLivesMatter, or want to "take the country back from immigrants", then you're not really a fan at all.
Geek culture isn't suddenly #leftwing... it always was.
You just grew up to be intolerant. You became the villain in the stories you used to love.