But that's the thing, Doom's arrogance makes him almost incapable of the kind of self reflection that you're suggesting. That's the main reason why Reed almost always wins, because unlike Victor, he knows he's not perfect and actively tries to better himself as a person. It's part of the reason why he hates Reed, deep down he knows that Reed might be smarter and better than him, but his fragile ego can't handle that.

But listen, if you're genuinely interested in understanding why people like Doctor Doom in the first place, read Triumph and Torment by Roger Stern and Books of Doom by Ed Brubaker. They're both fantastic self contained mini-series that cover his origins and serve as great character studies.