Using AI generated images in posts are generally okay as long as there's transparency. What you did here is clearly generated an image, traced it for the "sketch", then used a selection tool to erase the other parts to make it seem like you drew them manually.

You pretended to have drawn them yourself while also having the eraser tool and the brush size visible from the screenshots.

Not to mention the text also sounds sus.

That is pretty much frowned upon by the community everywhere.