For me, knowing that the artist is a terrible person ruins the art for me, or at least compromises it to the point where I don’t feel comfortable in my skin continuing to peruse it. And that even if I wouldn’t be buying anything new or otherwise be giving the artist money.
Take as an example Jon Schaffer, head of metal bad Iced Earth, which I liked quite a bit in the past. Later it became clear that he is at least problematic, and once he was identified as having participated in the January 6 riots, that was the end of it. I still own older Iced Earth CDs, but I can’t listen to them any more.
Or Joss Whedon, whose work I used to love, and I own a lot of DVDs of his stuff. But watching it now knowing what he’s done particularly to many women he worked with just seriously hinders my enjoyment of what I once really liked.