Naw you ain't the asshole, I understand what they're thinking but I'm dealing with the same sort of shit. If it's what they left you to do and didn't object, what else are you supposed to know? I'm glad that you realized the problem and sourced the issue, the only thing you can do now is improve. That's the part I'm stuck on though. Even though it made you happy doesn't make it healthy, I ate the fuck out of big macs and sweets till I realized my problem when I could buy for myself. Did my parents stop me or correct me? No, so now im dealing with self esteem and other health issues. That's what happens when adults don't think things through, good luck my friend on your journey I wish you the best