time travel? ideal for plot holes!

Rating: 2/10 (4 May 2019)

Time travel destroys any film...time travel doesnt exist in the physical world..its an invention of writers and authors to close plot holes and impress audiances...so, any film or book containing time travel, IS A MESS! so, i dont see any reason to grade this movie more than 2 stars...cgi, fights, ok , but a real good movie, must have a believable story! for me, sorry it didnt work...
question...why thor and hulk had to be humiliated so much in this movie ? why toni stark had to die? to offer the framatic essence to the story?
is this the end of marvel heroes?