While I generally don't have a beef with using a walkthrough for looking up stuff (especially if it's a game that features old-school adventure game logic like "use pineapple on doorknob to unlock the skylight", because my gaming time is limited and ain't nobody got time for that shit), sticking everything else in a game on EZ MODE and then claiming you "beat" it gets a "C'mon, son" from me.

Personally, if I were a game dev, I'd stick in difficulty levels that had the very bottom one be "Journalist Mode", but called something like "Minimal Mode" so it's not as obvious. Invulnerability, unlimited ammo or attack power, bosses with half health, etc, and then when they "beat" it, they don't get the ending cinematic. Instead, they would get a title card that reads "GIT GUD AND PLAY ON NORMAL".