I posted those for fun. It had nothing to do with you. But yeah, if you think that Thanos is one-note then you frankly don't have a clue what you're talking about. And in comparison to Doom, the "layered" villain? The guy who's so reliably treacherous that he makes 1980's Starscream look like a paragon of team spirit? Nevermind that Doom is motivated by the oldest and most cliche'd supervillain motive of all time, world domination. As far as motivations go, it doesn't get more one-note than that.
Ultimately it's all subjective and up to personal opinions. In
my personal opinion, though, Thanos is the superior character. He's the one who has more depth and layers to him. His motives and the things which drive him are unique. That's why he went from being a one-off Iron Man villain and grew so much, while Doom continues as a Fantastic Four villain. One-note, one-trick ponies don't grow beyond the bounds of their original creation the way Thanos has. Only textured, nuanced, and original characters succeed at that. That is why Thanos has become what he is today, and while Doom is interesting, he's certainly not as interesting as Thanos.
Only reason I didn't say that is because I didn't want to get into the merits of whether or not a Kirby creation stumps everything else by that fact alone.
Because it's a nonsensical argument. Or are you going to argue that the Black Racer, Beast, Big Barda, and Machine Man are superior to the likes of Wolverine, Deadpool, the Punisher, etc? Dr. Doom was co-created by Stan Lee, too, who also created Diablo and Ravage 2099. So are Diablo and Ravage 2099 likewise superior to every other character by dint of being created by Stan Lee? It's a meaningless argument, because both men created characters which were dogs or nowhere near as successful as their most well known characters, and plenty of other creators have created characters on par with theirs, if not superior (Superman, Batman, Wonder Woman, Green Lantern, Flash, etc. weren't created by Lee and Kirby, after all. Neither was Wolverine, possibly Marvel's most popular character right alongside Spider-Man).