I think it's cool that you took a stand with it. I most definitely would not be alright with someone taking my artwork essentially passing it off as their own.

Hell, I've redrawn art (non-fandom) a couple of times (one was even as assignment I had in college), but I would never, ever post it somewhere in fandom without huge disclaimers of THIS ISN'T MINE! I COPIED IT! ORIGINAL ARTIST HEEEEERE! all over it.

This dude's 'art' always kind of just made me roll my eyes and scroll by without even looking.