That seems to me to be less about how much content there is, and more about how you've chosen to relate to that content.
A lot of it is also about how the stories are intertwined. There are differences between stories that exist in the same universe, stories that reference each other, stories with required history, and stories that straight up advertise for other stories.
For example, you can watch The Avengers and Avengers: Age of Ultron without seeing any other movies in the MCU. Incredible Hulk and Guardians of the Galaxy take place in the same universe, but are basically isolated stories. And there are references to Iron Man, Thor, etc, but those are all optional viewing.
Avengers: Infinity War has a lot of required history to understand what's going on. I saw it without seeing Thor: Ragnarok and was really caught off guard at the beginning. If I hadn't seen Captain America: Civil War, or Black Panther I would have been completely lost. Early on, it seemed like the MCU had a goal that series would be contained (e.g. Iron Man 1, 2, and 3 were independent from Thor 1 and 2, etc). I feel like they dropped that idea around Civil War, which was technically a Captain America movie but really should have been an Avengers film. I also know that Agents of Shield had some tight tie-ins with Winter Soldier and Dark World, but I managed to steer clear of all three of those.
Likewise, season 1 of the Mandalorian references the EU a lot, but the story doesn't drift that far from Mando, the characters they introduce, and the original movies. Season 2 delves deep with the darksaber, Ahsoka Tano, etc. Scenes like the confrontation between Bo-Katan and the Imperial officer in episode 11 allude to history and relationships in way that breeds intrigue without giving you much information; they're clearly pushing the viewer to dig into other series to learn more.
And that's before you even get into to crossovers, poorly disguised pilots, and cameos.
