My guess is it's because of: something about your art, they see you as a baser or a tracer, they're a Choosing Beggar who wanted free art or else, they're a Karen/Kevin who tried to demand something you wouldn't ever give them, who you're friends with, because they or someone they "respect" cough cough Worship cough cough doesn't like you, some wrongdoing they perceive as your fault, something you said that they want to twist around so they can act like they're the victim, they want to steal/use your art and OCs for their own gain with you being none the wiser... The list goes on and on. Whoever they are and whatever they've done, they are lesser for doing this. Just be proud of your art and yourself, and know that you're so amazingly awesome that whoever it was is so put off by your magnificence that they couldn't stand it any longer. May your life be filled with wonder, joy, love, happiness, delight, peace, mental & physical wellbeing, and great food! And devoid of people like from earlier in my comment.

Edit: Sending you virtual hugs and good vibes!

Hmmm... Quite a conundrum. Perhaps it is the Weasyl account of somebody you blocked on there?

Mayhaps one of my earlier ideas, then? What was their Weasyl username if you feel comfortable sharing it?

Okie dokie. I just hope you know the fault lies with them, not you. The fault lies with them, not you!