Making it in the first place is already bad(iffy copyright with the AI usually being trained off art without artist’s consent & unreasonable energy use for genAI), but charging money for something made off other people’s art being fed & rehashed together through AI is a new level of shameless.
It looks clearly AI generated (cheap & soulless, with no thought behind the random details). If you want to make backgrounds & profit off it but are scared/too lazy to how to draw at least learn photobashing or photography instead