Here is the proof he provides defending his stance of embittered outrage on the matter:
And I quote: OWL TURD? MORE LIKE "OWL JUST HELP MYSELF TO YOUR ORIGINAL COMIC IDEA"
And he keeps spewing out more enraged fiery sentiments: "AWKWARD YETI?" MORE LIKE "AWKWARD YET I HAVE NO PROBLEM STEALING ARTWORK"
Poorly Drawn Lines steps up to toss some more wood on the fire:
And, honestly it just keeps going:
Oh, and did we forget to mention that this whole thing might've been an expertly crafted April Fool's Day prank? Whoops.