This was bad, so I rewrote your story for you.

Rating: 3/10 (30 April 2019)

After Infinity Wars, this is what utter disappointment feels like. Lazy, shoddy writing, a story full of plot holes that are inevitable with time travel, incomprehensibly misguided story lines (Thor, Hulk, the hammer, easily created new gauntlets, Thanos, Black Widow's death an afterthought while Tony Stark gets a 20 minute funeral, a wasted Captain Marvel, a botched final battle), and boring, so boring. I noticed people around me checking the time on their phones or going to be the bathroom because nothing was happening.
And it could have been so simple: The basic plot could have been the careful planning and carrying out of the killing of Thanos (who still has all the stones, because why would he destroy them?) on his planet. The Team failed last time, but this time they have Captain Marvel, and that's the game changer. You succeed. Two hours, nice, clean, tight script with no inexplicable plot points. At the end Captain America could die because mission accomplished, Tony retires and gets his family, Widow and Hawkeye rebuild their lives - and Shield - together, Antman has his daughter, Thor and Captain Marvel become an item. With Hulk, Nebula and Rocket, they become the new Avengers. Mourn the dead. Celebrate the living. Rebuild the world.
There you go, I rewrote your story in 10 minutes. A thousands times better.