Avengers Unexplained

Rating: 7/10 (26 May 2019)

My quick summary of Engame:
How is Thanos so damn powerful all of a sudden?
Why spend 10 years explaining the power of Caps Shield and Thors Hammer n Stormbreaker only for Thanos to show up with a random weapon that is unexplained and is way more powerful?
How is Sam the new Cap when hes not a super soldier but a normal human, especially considering all the epic encounters Cap went through now we have to believe that Sam is of similar strength n stature?
And my biggest question... Why the hell did the MCU introduce Captain Marvel at the end of Infinity War like she was going to be the saviour ( even giving her a solo movie ) then only using her for a total of 5 mins screentime in Endgame which ended with her struggling to beat Thanos n then getting blasted?? What was the point of that? Shouldve just saved her for phase 4! Shes basically the Superman of the MCU but cant match Thanos?
i scratch my head..??