It's uh... based on your likes and viewing habits I believe.
You can course correct the Discover feed by hitting the little hamburger menu and hitting "Less like this", you can also mute certain words or phrases to hide specific things (I've got many muted for my sanity)
Believe me, I’ve never “liked” them, I’ve muted them, requested to “show less”, blocked them and removed them from my feed and yet they continue to increase in frequency
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You can course correct the Discover feed by hitting the little hamburger menu and hitting "Less like this", you can also mute certain words or phrases to hide specific things (I've got many muted for my sanity)