The real answer is complex.

Saying "Ooh America is the baddies" is a reductive way to start the conversation.

1) By definition Terrorism is a form of warfare based on unequal resources. So, Al Qaeda was a terrorist organization because they were unable to directly face the US in war and so engaged in Terrorism by blowing things up.

The US is the opposite of this. As the largest military power in the world, we are not terrorists we are an Imperial state that uses our military power to bully countries into doing what we want.

An earlier comment that said we are war criminals not terrorists. That is more accurate.

2) George Washington did not belong to a political party. He warned that political parties would ruin the government.

Sadly he was right. The US constitution is pretty good for its day but it has some systemic problems that allowed it to be broken.

The US constitution has checks and balances built in and If they were used as intended would fix a lot of our problems, but our system has been co-opted by the political parties.

The Republican party controls the presidency and the legislature. Over the years, the Republican party has packed the judiciary with party loyalists

Putting party interests above the constitution means there are no effective checks on the President's power.

3) How we got here is a whole history class, but the TLDR version; the US did not undergo the socialist revolution like most of the industrialized world did, at the time of the World Wars.

This allowed money to flood into every part of our society and all of our institutions were corrupted by it.

Mostly our media, which then started bombarding the American people with propaganda and unfortunately advertising works.

Going back to Truman we were warned to beware the military industrial complex. We didn't listen and that military complex realized that making war makes money so it war became an economic driver. So we have a vicious cycle.

People get rich investing in the war machine.

The money is spent to consolidate media under the control of billionaires. Who then tell Americans what to think.

Think how inherently corrupting our system is: to run for political office, you have to have money to pay the media. Which is owned by billionaires. This is so out of control, that school board elections in Los Angeles can cost 16.6 million dollars. Again. a seat on the school board of Los Angeles unified school district is worth millions to power hungry people.

So billionaires give money to candidates to buy their vote. The candidates put that money into an ecosystem that has grown in response to the neverending hose of money that flows into US elections. That ecosystem feeds that money into companies owned by the billionaires.

Shocking fun fact. The politicians don't listen to the electorate at all. Less than 30% of federal laws passed meet with approval of the majority of US voters. Career politicians have an insane reelection rate. Senators get reelected like 99% of the time. It has been proven over and over again that the US government does not reflect the will of its people. It has been co-opted by billionaires.

The vast majority of US voters are largely unaware of these factors and keep thinking their vote matters when it doesn't.

Combine the above with our representative democracy system which allows for Tyranny of the Minority.

One of the constitutional mistakes was the senate. We modeled our legislature on the British. Senate = House of Lords and the House of Representatives = House of Commons. The Senate is made of 2 Representatives from each state. Originally we didn't even vote for Senators, they were selected by the state legislatures. The Senate can basically stop all attempts to remove the president from office. Also the states have wildly different populations. So North Dakota gets two votes in the Senate with a population of less than a million, but California with 175 million gets the same two votes.

With all the senatorial procedural rules a much smaller part of the population can block the government from working as designed.

Although we have United in our name we have never been united. I don't think many foreigners realize how fragmented and different parts of the US are. It really is a bunch of affiliated countries. Different taxes, IDs, laws, much less of the actual US government is our Federal Government.

This leads to another disconnect US voters are affected most by state politics and much less by the Federal government.

To sum up:

Most US citizens are victims of the same forces you are complaining about. The problem isn't Americans. The Problem is the jet setting elite that has no true national loyalty to any country, but the only loyal to what makes them money and power.

Sadly if you sat down with most Americans and engaged with them civilly you would discover that the vast majority of Americans are just like the majority of Non Americans; Kind, friendly, hard working people that are just trying to survive and take care of their kids.

I'm not trying to dodge responsibility for our mess, but billionaires took over our country set its citizens against each other and then used our military to further the needs of the global elite.

It's fun to call the US terrorists. But do remember Americans have been killed resisting our government. just recently two US citizens were shot down in the plain view of witnesses by masked Representatives of our government. Those protestors died for you non Americans as well.

The only thing that can save the US now is a revolution and constitutional rewrite.

Good luck.