I think the complaints are valid. The MC is completely depending on deus ex machina right now, which is boring AF and sort of cringy. You can't just insert a pacifist who doesn't know anything about the world into the body of the demon lord in a fast-paced situation where almost everyone wants to kill him and expect the audience to applaud at his pathetic floundering. You need to give him useful tools, a bit of time, a bit of knowledge, and some ability to make decisions (dude just reacts like a bump on a log to a bunch of stuff), so that he actually has a chance to con his way out of these situations. His eye thing helped him a tiny bit once, but other than that it's been mostly useless while attacks and shit is getting thrown his way, leaving the MC floundering. Also apparently his body isn't very tough or resistant to magic for a demon lord. You'd think his skin could at least resist a weak human's slash. The author did NOT start this well. I'll keep reading and hope it improves.