Understand Time

Rating: 6/10 (28 April 2019)

I loved the film, it was amazing, the CGI is absolutely unrivaled by anything we have out there at the moment at this scale. The characters all came to their right and the acting (as always) was perfect.
Why would I rate it anything lower than a 10/10 then? Here's why:
The "time traveling" aspect created plot holes so huge that it made it impossible to fully enjoy just how brilliant the film was.
1. The Avengers decide to travel back in time, Scott Lang and Steve Rogers warn the others to avoid Time Paradoxes, to which Bruce Banner/Hulk states that "time does not work that way" and that past and future events cannot happen in the now and the future cannot happen before the past, yada yada, essentially stating "Time is Linear, the future is set, the past cannot influence us, we cannot influence it". This by very definition means that if time is linear, a new timeline would exist if you change anything in the past, which means that they CANNOT go back to their own timeline, or they could've never gone back in the first place.
2. They have time-travel which according to hulk, won't change the past if they change their now, but more than that, THEY HAVE AN INFINITY GAUNTLET AAAANNNDD TIME STONE. How Gamora died, Black Widow died and Iron Man died, and weren't brought back to life makes absolutely NO sense. Gamora came from the past before she was killed by Thanos to 2023 and she and Star Lord could start things fresh and be together, why couldn't the same be done for Tony Stark and Black Widow? If Gamora could be "saved" then the statement "I tried everything, she cannot be brought back" about Black Widow is just wrong. Tony stark, could've easily been saved as well, in the same way that Dr Strange won in his own movie, he could've let time restart until the best outcome was achieved.
3. The MCU quantum realm is worse than the DCU speed force. When I say that I mean, it's a term used whenever it would be too hard to actually explain a real way of working and throwing a fancy word in is just easier. Ant-Man felt the 5 years as 5 Hours in the original shrinking down, then all of the sudden 3 years could become 3 seconds, it's understandable if you could effectively pin point the location of a superhero and bring them back, this is something they could do perfectly, when Hawkeye went back in time he DIDN'T WANT TO come back to the future before seeing his daughter, he could however not avoid it, because Hulk had him tracked, so he was pulled back against his will, yet at the end of the film Captain America cannot be brought back and stayed in the past for an extra 40 years, because he wanted to, something that was proven impossible by Hawkeye.
I feel like the writers felt "the fans are retards, they just want to see their favorite heroes on a big screen" and they were right for the most part, but some of us noticed, and we were offended by how little you think of us.