Does the United States spread democracy everywhere because it’s the easiest form of government to corrupt?

The US does not spread democracy but dictatorships.

America is a Republic and the people choose their leaders.  You may think what you wish, but Freedom provided under our form of government is a wonderful thing.  It gives any man the opportunity to work and make himself wealthy.  As we say "the pursuit of happiness."  Fraudulent behavior happens quite often, for instance the Dominion Voting Machines with 68% inaccuracy rate.  Gives great question to the American Presidential election.

If man can manipulate the voting process, then the people do not stand a chance.  Even with its great problems, it has been the best form of government throughout history.

Republicans are the source of most American corruption. Get rid of them and mostly problem solved.

That is one reason, yes.

"Many forms of Government have been tried, and will be tried in this world of sin and woe. No one pretends that democracy is perfect or all-wise. Indeed it has been said that democracy is the worst form of Government except for all those other forms that have been tried from time to time.…" — Winston Churchill

Corruption is the bane of capitalism. The corruption can be curbed w/ limitations on capitalism. Absolute power facilitates corruption. Democracy intends to distribute the power w/ checks and balances channels. The people vote for some of the people in the channels which results in representation.

--  No, the US never spreads democracy around the world. It has constantly assisted right wing groups to overthrow legitimately elected democratic governments and installed right wing military dictatorships.

--  Military dictatorships are the easiest to corrupt.

People prefer democracy. They want a voice in government. If you think it's the easiest form of government to corrupt, you might want to provide some evidence of that.

of course not ... most dictatorships are much more corrupt  [China is an example of this]

From what I can tell, Marxism starts off corrupt. It's designed to be corrupt.