Why do you criticise everyone else thinking your country and attitudes are best and not consider others might criticise the usa?

It's due to a form of brainwashing from an early age. Some people were never taught to be critical thinkers. Also, it's hard for some people to accept criticism of any kind.

Everyone is entitled to their opinion. I love my country and of course I’m biased somewhat..,

I, by no means, do not.
The USA is ripe for criticism.

No country is above reproach. Blind patriotism is bad, and so is criticizing another country, when one refuses to look inward, that's when you get arguments when you criticize the USA, but think your own country's shit don't stink.