Have you seen the David Mamet memo from the unit? He shreds 90% of procedural television and explains why common tropes are boring poo.
https://www.slashfilm.com/a-letter-from-david-mamet-to-the-writers-of-the-unit/Iron Man 2 & 3 were written by the then established Marvel Committee. It was no longer "Let Favreau take a swing for the fences" it was "We really need to work on establishing the game plan going forward".
That's why Tony damn near takes a back seat to Scarlett. I bitched about it back THEN talking about how little of a golly I gave about Thanos. When Infinity War came out and people wanted to work Thanos magic purple crank, I was unhappy, to say the least. If you have the building blocks of the universe, maybe make people less selfish, instead of murdering their friends and family in an arbitrary manner.
Even Endgame works that purple crank, when Steve "War Criminal" Rogers talks about seeing whales in the Hudson. Which honestly seemed really stupid, but I was mostly checked out anyway.
The gift of a long form series is that you get to establish, evolve, and change a cast. They become different people over time, and that can be a treasure to the audience.
Instead, modern series attempt to hurt the viewer for getting attached to a character, turning them into a voodoo doll or pin cushion. Which is even worse, because they're aping Whedon's "The Woobie must suffer".
All that being said, Mamet really bent the pig when it comes to nepotism. He let his wife write an episode of a supposedly "grounded" series where Spec-ops badasses hide under the shade of being file clerks,
And mixed it with religious mysticism. That's right, she brought the spear of Longinus into play.
And yeah hey, that's a good note, gets the stew a brewing!
Nope, it's really real, it's the spear of Longinus. They use it to bring a mortally wounded main cast member back from the edge of death.
Like, even if you call cowpoo on mysticism, that's a good note. "We have to keep the fanatics away from the counterfeit religious sacrament to avoid them being able to claim legitimacy" is a spicy bless'ed story.
Nope, it's for realzies.