Because they create wars for profit - no other reason.
Because they won't allow their military personnel to be tried in international courts.
Because they actually dropped atomic weapons on aged people, children and women - when, they could so easily have picked other targets to show their power.
Because they have had such atrocious leaders
Nixon was a lulu - he went behind America's and Johnsons back days before the election and told the North Vietnamese to pull out of the Paris peace talks because he would get them a better deal - it was just lies and BS - and, Johnson knew it - but, Nixon won on the strength of that.
Kennedy took them into that war - stayed in that war purely to get reelected, Johnson stayed in that war even though he knew it unwinnable, then Nixon was even more atrocious
They killed civilians by the 100's of thousands -------- and, they did it with war crimes everywhere - but, they don't allow their personnel to be tried in International courts.
The atrocities haven't stopped - they go on to this day.
As a nation and superpower - they are absolutely disgusting.
They have dragged us Australia into every piece of crap war they have started - and, we have got body bags as payment - and, now - enemies - some at home right here.
And, their people stand in wonderment in just how much of the world hates them - even hates them so much that they fly planes into their buildings and a good portion of the world rejoices
there is no need to wonder - it's obvious.
I like many of them as individuals -- but, there Nation absolutely sucks.