Doesnt make sense

Rating: 6/10 (30 April 2019)

I wanted to love it but the story doesnt make sense unlike the 21 movies before it that made all sense.

If hulk says you cant change the future by changing the past then you cant erase the alternate timelines too except make more alternate timelines by returning the stones.
Returning the stones ,how did cap inject back in jane or dealt with red skull and the sacrifice ?
It needed also more pace and action, infinity war was epic and this is like wtf happened.
No emotional involvment whatsoever.