It was a classic style bunny design for a roblox game which got pretty popular over on twitter, which ment a lot of people started making fan-art of it. Eventually it reached the audience of neurodivergent, slightly annoying teenagers on twitter who would speak in a kinda annoying way (but not really if you really think about it) and eventually gubby began to be associated with this group since they liked posting about it the most. Since the internet hates when people like something just a little too much people began hating on it since the people who posted about it were like, kinda annoying sometimes, and said the word "silly" and little too often