In a pinch, I make a post to a reddit profile and then link direct to the image. Unlike Imgur, that does link directly to the single file and not a page with html/js.

I use ImgBB, they are probably stealing your images and not deleting them if you set it to auto delete but for screenshots like this it probably doesn't matter.

I use ImgBB, they're probably stealing your images but did screenshots like this is doesn't matter.