endgame should not of been made infinity war should of ended it
Infinity was IMO the high point of Marvel. Thanos was one of the best and most baddest, yet complex antagonists I have seen in years. Even just hearing his theme it instilled fear in you because they had perfectly shown he was a force that could beat the Hulk like a child and would man handle everyone else
Everything seemed to naturally flow scene to scene and finally buildup in a satisfying end. Rather than "kill 50%". maybe just have it kill enough to stabilize the ecosystem off life on the planet. This would mean you could of killed off the superheros you intended to (cap and stark) and kept the rest.
The biggest benefit is that the broken Thanos (in another marvel film but not endgame) has destroyed the infinity stones. Meaning we don't have the issue that endgame created which is "why not just time travel?"
Endgame was unessecary. the first 1/3 is just a big cry and depression fest. The second third was the best part but created massive issues for future movies like I said above. And the last third just felt like a redo of infinity wars only less impactful and less stakes because we know they will win. we already saw the giant mass fight of everyone in Wakanda and Thanos snap so doing the same thing over is just boring.
With my alternative you have got rid of many problems endgame set up, ended that phase on the highest note. and can now start a new phase fresh without the problems and a perfect opportunity to start "small scale" and once again slowly revamp up tensions maybe with the secret invasion storyline and the avengers and heroes in general in disarray after that massive fight and loss of cap and stark