As a finale of sorts it's good but on other fronts it fails

Rating: 4/10 (31 January 2020)

Okay, I was about 12 when Iron Man hit theaters back in 2008 and I thought it was awesome and I kind of had a bit of an on/off relationship with the MCU - I mean I expect people to disagree with me on this but the only decent movie out of phase 2 in my opinion was Captain America Winter Soldier. But after this became the highest grossing movie of all time I decided to catch up and see if it was worth it. As this is the highest grossing film of all time and there's about 20 films worth of backstory for this I'd honestly rather not dive into the plot and things like that as either you've seen it or you won't.
Right onto the stuff I like, I treated this as a series finale to a TV Show for some aspects and I actually think it delivers a satisfying conclusion to all of the characters. It's not easy to do that in a satisfying way for many, many characters and I'll give credit where and when it's due. I also really liked the bits in the first act where they deal with the grief of what Thanos did in Infinity War. Each one deals with it differently and each worked.
Now onto the more controversial opinions of this movie. The main gist of what happens is that the surviving heroes find a way to go back in time to undo what Thanos did in Infinity War for their own gem collecting - okay, fine. My problem is that they establish that they can't change what happens in their past. It's the only rule for time travel given and they literally ignore it by doing what they do in the film. I mean the argument could be made that they said they'll put the stones back immediately after undoing what Thanos did but Thanos also gets wind of this despite it not being in any of the films beforehand and past Thanos travels to the present to stop them but Iron Man kills him - more stuff that makes no sense. It's literally the focal point of the entire plot.
Now onto another point of the plot which is also kind of a complaint with Infinity War but no matter, I'll bring it up here - Thanos' plan is moronic. I get that what they're going for is a more sympathetic look at him and not the guy who did those things because he wants a romantic relationship with The Grim Reaper but if with no warning half of Earth (just Earth) got snapped away then cars would have no drivers, planes would have no pilots and economies would pretty much crash as a result. Causing way more death and starvation than doing nothing to combat overpopulation - I mean Thanos literally says in Infinity War that it's completely random. I mean I know he takes out half the universe in the comics and introducing The Grim Reaper would be a bit out of nowhere, I admit both these things however I really think "The universe is overpopulated so I'll kill half the universe with a magic glove that can control said universe" just really doesn't work.
As a way to say goodbye to the majority of heroes who appeared in the MCU previously this satisfies on that front but my problem with it is that the entire story save for the first act where they're trying to recover, before the time travel thing gets introduced is really not satisfying and considering this is the longest MCU film and that it wraps up everything the overwhelming feeling I get from this is exhaustion. There is good here but while I like previous MCU films this big crossover feels less like wanting more out of it and more like I need to take a break from the series and play catch-up again.