Luther is probably the most undermined "Number One" in all of superhero history.
I mean... Cyclops had Wolverine but he also had the respect of most X-Men members. The Justice League respects Batman even if he got his powers because he's a billionaire. And even if The Avengers bickered, when the need arises, they would just forget about their egos.
Not Luther though.
Even Vanya messes with him.
They even let him live on the moon to collect "important stuff".