Airlines/ Airports

I travel the world extensively and as an Australian Traveller and Business Person I never have any problems until going through US airports and in particular MIA. That airport is a shocker!
Last week I had to return home from a brief stay in Cancun and had to catch a connecting flight in MIA to go to LAX and then home to SYD.
Never again!
At the immigration counter my partner and I were screamed at as we were standing with our feet on the line rather than behind it (can you believe it!?) then treated as common criminals by the immigration thug! (What a pig!)
To top it all off we then had to pickup our entire luggage from a carousel and check it in again through customs so that it could be loaded on the next aircraft. There were people everywhere trying to push their luggage through this huge crowd of people all doing the same thing.
We made our flight with no time to spare but our luggage did not.
Most of other airports I have been to in the USA have been fair but not great with the exception of the thugs at the immigration counters which seem to be pretty much the same everywhere.
I travel a lot on business and know may others that do. I will certainly inform them of my dissatisfaction at the way I am treated at US airports. In future I will make every effort to avoid these airport and destinations and will take my money and business elsewhere.