For me that's kind of the point too. You can't bring a known IP to newcomers and expect them to catch everything left and right with prior knowledge. But this is exactly what creates subpar movies that are ok-ish, because hey, we can't just drop you all this knowledge out of no where. The elements that made ascend the original story? Well, drop those, no one other than the hardcore fans will know what we're talking about and everyone else's too "limited" (to not say dumb) to get it on the go.

Case in point, The Simpsons Movie: A lot of minor details and plots where dropped because newer fans "wouldn't get it" (like Milhouse having a crush on Lisa, a scene that was plain dropped). Why does this matter. In the end the Simpsons Movie became a one time thing, everybody talked about spider pig for six months and no one has talk about it anymore.

Why make a movie that's gonna mutilate and change source material for the sake of being accessible. What about the fans that had kept the franchise alive before MCU? Also, poor planning? Why didn't they explore more the cosmic entities on the Thor and Dr Strange movies. At least give a better hint than there's stuff that goes far beyond superheroes and entities that make them look like the average joe looks to them: completely powerless and helpless. That add dimensions. If Marvel's plan all along was to tie everything during EndGame, I'm pretty dam sure they could had build a better universe and perhaps even replace Fox owned characters for others. Or even create specific characters for this adaptation and bring them as newcomers to the Marvel Multiverse - like the Walking Dead did with Daryl, he was made for the series and was so popular that made it to the comics. How about a newer set of superheroes instead of twisting and bending the ones already exists just to "make it accessible for everyone". If this sounds elitist then I say they just went for the cashgrab, and that fine, but let's see how the adaptation stands against the source material. Because it's not like the battles against the comics entities were pages long. Proper presentation of the elements is part of good storytelling, picking which elements to carry is part of making a good adaptation. At this point they might as well call it "Thanos and New Sad4254 Earth wars".

In the end, I guess what I really expect is more quality and a better effort from these multimillion dollar transnational corps is a bit more of an effort on these type of works.