Unfortunately, the Bluesky Discover feed is utterly garbage, seemingly insistent on pushing political content, especially of the resistlib variety, no matter how many times I give "not interested" feedback. It's essentially the mirror version of the twitter For You algorithm; less overtly heinous but still a deeply unhealthy engagement trap. You definitely have to use custom feeds and the other features, but the most prominent and easiest point of entry for new users is a drip feed of ragebait.