Wow, really? What gives you the right to tell artists what they should and shouldn’t draw? What gives you the right to put down what an artist likes and attempt to guilt-trip them into drawing what YOU like?
News flash: artists aren’t obligated to draw for you! They can draw whatever they want! If the artist likes a certain pairing better than your favourite pairing, THAT’S OKAY. If the artist draws their favourite characters more than your favourite characters, THAT’S NORMAL! You know what wouldn’t be as normal?— if they drew your favourite characters and pairings a ton and barely drew their own favourite characters and pairings— because that makes no sense!
And another thing— not drawing certain characters as often as others doesn’t mean the artist doesn’t like the characters! That’s like me eating way more apple pie than blueberry pie; I still eat blueberry pie, but not nearly as much as apple pie because I happen to really, really like apple pie! That doesn’t mean I hate blueberry pie! Why on earth would you jump to the conclusion that I hate blueberry pie simply because I don’t eat it as much as I eat apple pie?! How does that even make sense?! If I hated blueberry pie, why would I eat it AT ALL?
If you want to see art of your favourite characters and pairings so badly, GO DRAW THEM YOURSELF. Fandom artists and writers aren’t machines who’ll conjure up art and fics for your sake, especially if you rudely demand it of them. Maybe they’ll indulge people once in awhile if they’re not busy! Maybe they sometimes like to take on polite requests! Maybe they don’t take on requests at all— AND THAT’S FINE! Are you cognizant of the fact that artists and writers have lives as well?! How would you like it if some jerk(s) kept messaging you (anonymously), demeaning what you like and demanding that you do what they want? Please get over yourself!